Imashini ya Aerosol ni tekinoroji yingenzi ningirakamaro mubuzima bwa none. Ibicuruzwa bya aerosol biragaragara hose mubuzima bwacu bwa buri munsi. Kuva ku bicuruzwa byita ku muntu kugeza ku basukura urugo kugeza mubikorwa byinganda, aerosole yabaye igice cyingenzi mubuzima bwacu. Nkibintu byingenzi bigize sisitemu ya aerosol, moteri ya aerosol igira uruhare runini mugutera ibicuruzwa no gutatanya.
Aka gatabo kagamije kuguha ubumenyi bwuzuye bwimodoka ya aerosol, harimo nuburyo ikora, ubwoko bwayo, ingaruka zidukikije, hamwe niterambere ryigihe kizaza.
Uburyo Amabati ya Aerosol akora
Amabati ya aerosol ni uburyo bwiza kandi bworoshye bwo gupakira no gutanga ibicuruzwa. Ikoresha igitutu cyo gusunika ibiri muri kontineri kugirango ibe ibitonyanga byiza cyangwa ifuro. Ihame ryakazi ryibikoresho bya aerosol rishingiye ku guhuza ibice byinshi byingenzi, muri byo moteri ikagira uruhare runini. Ihame ryakazi ryibikoresho bya aerosol rikoresha imbaraga nubushobozi bwa atomisiyasi ya moteri kugirango igere ku bicuruzwa neza kandi bigenzurwa.
Ibice byingenzi bigize amabati ya aerosol
Indege isanzwe irashobora kuba igizwe na kontineri, valve, nozzle, hamwe na moteri.
Ibikoresho : Umuvuduko ukoreshwa mububiko bwibicuruzwa na moteri, mubisanzwe bikozwe muri aluminium cyangwa ibyuma.
Agaciro : Igikoresho gikoresha imashini igenzura ibicuruzwa. Iyo valve ifunguye, ibirimo bisunikwa muri kontineri munsi yigitutu.
Nozzle : Ikintu cyerekana ibicuruzwa kandi kiyobora icyerekezo cya spray. Igishushanyo cya nozzle kigira ingaruka kumiterere ya atomisation no gutera morphologie.
Icyuma gikurura : Gazi cyangwa gaze ya lisansi itanga igitutu kandi ifasha atomize ibicuruzwa. Imashini ivanga n'ibicuruzwa ikabisunika hanze muri kontineri iyo valve ifunguye.
Uruhare rwa moteri muri sisitemu ya aerosol
Ibikurura ni ishingiro rya sisitemu ya aerosol kandi bigira uruhare runini mugutanga ibicuruzwa na atomisation:
Tanga igitutu : Abamamaza batanga ibidukikije bihoraho byumuvuduko mwinshi muri kontineri, bigatuma ibicuruzwa bisohoka vuba mugihe valve ifunguye.
Atomize ibicuruzwa : Ibicuruzwa bivanga nibicuruzwa kandi bikaguka byihuse mugihe cyo gutera, bikwirakwiza ibicuruzwa mubitonyanga byiza cyangwa ifuro.
Igenzura rya spray : Imiterere itandukanye hamwe nigipimo gishobora kugira ingaruka kumuvuduko, ubucucike na morphologie ya spray kugirango uhuze ibikenerwa nibicuruzwa bitandukanye.
Uburyo bwo gutera ibicuruzwa
Iyo umukoresha akanze nozzle ya aerosol irashobora, valve irakingura kugirango irekure imvange ya moteri n'ibicuruzwa. Iyi nzira irashobora kugabanywamo ibice byinshi:
Kurekura igitutu : Nyuma yo gufungura valve, ibidukikije byumuvuduko mwinshi muri kontineri bihatira moteri nibicuruzwa gusohoka vuba.
Atomisiyoneri : moteri igenda yaguka vuba mugihe cyo gutera, ikwirakwiza ibicuruzwa mubitonyanga byiza cyangwa ifuro.
Gusasira : Igicuruzwa cya atomize cyatewe kumuvuduko mwinshi unyuze muri nozzle kugirango kibe kimwe, igihu cyiza cyangwa ifuro.
Gutatana : Igicuruzwa cyatewe cyongeye gukwirakwizwa mu kirere kugirango kibe ibitonyanga byiza, byongera aho bihurira hamwe nubuso bugenewe.
Ubwoko bwa Aerosol
Nkibice byingenzi byibicuruzwa bya aerosol, guhitamo moteri ya aerosol bigira uruhare runini mubikorwa byibicuruzwa, umutekano nibidukikije. Imashini isanzwe ya aerosol irashobora gushyirwa mubwoko butatu bwingenzi: imyuka isunitswe, imyuka yanduye na hydrochlorofluorocarbons (HCFCs), buri kimwekimwe gifite umwihariko wacyo hamwe nibisabwa.
Imyuka ihumanye
Imyuka ihumanye ikoreshwa cyane muri moteri ya aerosol, ibaho muburyo bwa gaze mubushyuhe bwicyumba kandi ikabikwa mubikoresho munsi yigitutu. Imashini isanzwe ya gaze isanzwe irimo
Azote (N2): gazi ya inert idafite ibara, idafite impumuro nziza, ikoreshwa cyane mubicuruzwa byo mu kirere bya aerosol.
Dioxyde de Carbone (CO2): gaze itagira ibara, idafite impumuro nziza, ikunze gukoreshwa mu kuzimya umuriro, imbunda zo mu kirere n'ibindi bicuruzwa bya aerosol bifite umuvuduko mwinshi.
Ibyiza bya moteri ikanda:
Umutekano muke: Imashini nyinshi zogosha zidashobora gutwikwa, ntabwo ari uburozi, kandi ntacyo byangiza kubantu no kubidukikije.
Igiciro gito: imyuka ifunitse nka azote na dioxyde de carbone ntabwo ihendutse, ifasha kugabanya ibiciro byibicuruzwa.
Guhagarara neza: gaze isunitswe ihagaze neza, ntabwo byoroshye kubyitwaramo, bifasha kuramba igihe cyibicuruzwa.
Ibibi bya moteri ikanda:
Umuvuduko udahungabana: Hamwe no gukoresha ibicuruzwa, umuvuduko uri muri kontineri ugenda ugabanuka buhoro buhoro, bigatuma igabanuka ryimikorere ya spray.
Atomisiyasi ntarengwa: Ubushobozi buke bwa atomisiyasi ya gaze isunitswe irashobora kugira ingaruka kumiterere ya spray no gukwirakwiza ibicuruzwa.
Imyuka ya gaze
Imyuka ihumanya ni ubundi bwoko bukoreshwa na moteri ya aerosol, ibaho muburyo bwamazi mubushyuhe bwicyumba hamwe numuvuduko mwinshi, kandi bigahinduka vuba mugihe cyo gutera kugirango bitange imbaraga. Bikunze gukoreshwa gazi ya gazi irimo
Butane (C4H10): gazi itagira ibara, yaka umuriro ikoreshwa cyane mukwitaho no gusukura urugo ibicuruzwa bya aerosol.
Isobutane (C4H10): isomer ya butane, isa na butane, akenshi ivangwa na butane.
Propane (C3H8): gazi itagira ibara, yaka umuriro, ikunze gukoreshwa mubicuruzwa byindege bya aerosol.
Ibyiza bya moteri ya gaze ya gazi:
Atomisiyasi nziza: Gazi ya lisukiya ihumeka vuba mugihe cyo gutera, bigatanga neza ibicuruzwa kandi bikazamura ubwiza bwo gutera.
Umuvuduko uhamye: gaze ya lisukari irashobora kugumana umuvuduko wumwuka wumuyaga mwinshi muri kontineri kugirango hamenyekane imikorere yibikorwa bya spray.
Ubwinshi bwikurikizwa: moteri zitandukanye za gazi zisukuye zirashobora kuzuza ibisabwa mubicuruzwa bitandukanye kandi birakwiriye muburyo butandukanye bwo gusaba.
Ingaruka za moteri ya LPG:
Umuriro ugurumana kandi uturika: ibyinshi mu byuka bya gaz byamazi ni ibintu byaka kandi biturika, hari ingaruka zimwe z'umutekano.
Ingaruka ku bidukikije: Imashini zimwe za LPG zigira ingaruka mbi ku gipimo cya ozone no ku bushyuhe bw’isi, kandi zikaba zihura n’amabwiriza akomeye y’ibidukikije.
Imashini ya gaz
Imashini ya Sol-gaz ni icyiciro kigaragara cya moteri ya aerosol irangwa nubushobozi bwabo bwo gushonga burundu mugukora ibicuruzwa, bikora igisubizo kimwe, gihamye. Bitandukanye na moteri ya gaze isanzwe kandi isukuye, moteri ya sol-gaz ntabwo ikora gaze cyangwa icyiciro cyamazi muri kontineri, ahubwo ivanga rwose nibicuruzwa kurwego rwa molekile.
Imashini isanzwe ya gaz-gaz irimo:
Dimethyl ether (DME): gaze itagira ibara, yaka umuriro ishobora gushonga mumashanyarazi atandukanye hamwe namazi mubushyuhe bwicyumba.
Hydrofluoroolefins (HFOs): icyiciro gishya cya hydrocarubone ya fluor ifite imbaraga nke zo gushyuha kwisi hamwe nubushobozi bwa zeru bwa ozone.
Ibyiza bya moteri ya sol-gaz:
Igicuruzwa cyiza gihamye: Icyuma kivanze neza nibicuruzwa, bigabanya ibyago byo gutandukana kwicyiciro n’imvura no kongera ubuzima bwibicuruzwa.
Atomisiyoneri nziza: moteri ya sol-gaz iteza imbere atomisiyonike yibicuruzwa kurwego rwa microscopique, kuzamura ubwiza bwa spray no kuyikwirakwiza.
Ihinduka ryinshi: moteri ya sol-gazi irahujwe nubwoko butandukanye bwibicuruzwa, bitanga amahitamo menshi yo gushushanya.
Ibibazo hamwe na moteri ya sol-gaz:
Kugenzura umuvuduko: Nka moteri ivanze nibicuruzwa, umuvuduko wubwato urashobora guterwa no gukora ibicuruzwa kandi bigomba kugenzurwa neza.
Igishushanyo cya Valve: Imashini ya Sol-gaz ishyira byinshi hejuru yo gufunga valve no guhuza ibikoresho, bisaba gushushanya no kugerageza.
Ingaruka ku bidukikije ya moteri ya aerosol
Imashini isanzwe ya aerosol, nka CFCs na hydrocarbone, bigira ingaruka zikomeye kubidukikije; CFCs irashobora kwangiza cyane urwego rwa ozone, bigatuma imirasire yangiza ultraviolet yiyongera. Imashanyarazi ya hydrocarubone nka butane na propane ni imyuka ikomeye ya parike itanga ubushyuhe bwisi. Mu rwego rwo gukemura ibyo bibazo, guverinoma zashyizeho amabwiriza n’amasezerano mpuzamahanga, nk’amasezerano ya Montreal yo mu 1987, kugira ngo akureho moteri ishobora guteza akaga no guteza imbere inzira zangiza ibidukikije. Kubwibyo, mu gice gikurikira, tuzasobanura udushya mu bijyanye na moteri ya aerosol.
Guhanga udushya muri tekinoroji ya Aerosol
Inganda za aerosol zihora zishakisha ikoranabuhanga rigezweho kugirango ritezimbere ibicuruzwa, rigabanye ingaruka z’ibidukikije kandi ryuzuze ibisabwa gukurikiza amategeko. Mu myaka yashize, udushya twinshi twagezweho twaje ku isonga, dufungura inzira nshya zo guteza imbere moteri ya aerosol.
Umufuka-kuri-Valve (BoV) Ikoranabuhanga
Isakoshi-kuri-Valve (BoV) tekinoroji nudushya twinshi mugupakira aerosol. Bitandukanye na sisitemu gakondo ya aerosol, tekinoroji ya BoV ipakira ibicuruzwa mumufuka woroshye, mugihe moteri yuzuza umwanya uri hagati yumufuka na kontineri.
Uburyo ikoranabuhanga rya BoV rikora:
Iyo umukoresha akanze nozzle, moteri irashyirwaho igitutu, ikanda igikapu igasunika ibicuruzwa hanze. Umufuka uragabanuka kugirango ugumane ingano nkibicuruzwa bisigaye, byemeza ko moteri idahuza neza nibicuruzwa. Iyo nozzle ifunze, umufuka uhagarika amasezerano kandi ibicuruzwa bihagarika gutemba.
Ikoranabuhanga rya BoV ritanga inyungu nyinshi kumikorere yibicuruzwa no kuramba:
Gutandukanya ibicuruzwa byuzuye: Icyuma gitandukanya ibicuruzwa, bivanaho ibyago byo kwanduzanya no kwanduza imiti.
Imikorere ya spray ihoraho: tekinoroji ya BoV ituma imikorere ya spray ihoraho bitewe numuvuduko uhoraho wa moteri, ukomeza atomisation nziza nubwo ibicuruzwa byashize.
Gutera ku mpande zose: Ikoranabuhanga rya BoV ryemerera gutera ku mpande zose, ndetse no hejuru, kuzamura uburambe bwabakoresha.
Imikorere myiza y’ibidukikije: Ikoranabuhanga rya BoV rirashobora gukoresha umwuka ucanye, azote hamwe n’ibindi byangiza ibidukikije, bikagabanya ingaruka ku gipimo cya ozone n’ubushyuhe bw’isi.
Isakoshi Yikora Kumashini Yuzuza Valve Aerosol
Ibindi bigenda byiyongera
Usibye ikoranabuhanga rya BoV hamwe na moteri ya sol-gaz yavuzwe haruguru, inganda za aerosol zirimo gukora ubushakashatsi ku zindi nzira zangiza ibidukikije zangiza ibidukikije kugira ngo zisimbuze moteri ya hydrofluorocarbone (HFCs), muri twe kimwe na hydrofluoroolefins (HFOs) mbere:.
Hydrofluoroolefins (HFOs) nicyiciro gishya cyibintu bya hydrocarubone ya fluor ifite ubushobozi buke bwo gushyuha kwisi (GWP) hamwe na zero ozone yo kugabanuka (ODP), kandi bifatwa nkibisubizo byiza kuri HFCs. HFOs iragereranywa na HFCs mubikorwa bya atomisiyonike, ibiranga umuvuduko, nibindi, ariko bifite ingaruka nke cyane kubidukikije.
Umwuka uhumanye ni ibintu byoroshye, byubukungu nibidukikije byangiza ibidukikije. Nubwo imikorere ya atomisiyoneri itari nziza nkiyukazi ya gaze, umwuka wugarijwe nubundi buryo bwiza kubicuruzwa bimwe na bimwe bisaba ubuziranenge bwa spray, nka brush ifuro.
Azote ni ikindi kintu cyangiza ibidukikije gifite imiti ihamye, idafite uburozi, impumuro nziza, kandi nta ngaruka igira ku gipimo cya ozone cyangwa ubushyuhe bw’isi. Azote ikunze gukoreshwa mubicuruzwa byo mu rwego rwa aerosol nka cream hamwe no guteka amavuta.
Nigute ushobora guhitamo icyogajuru cya aerosol
Mugihe uhitamo icyogajuru cya aerosol, abayikora bakeneye gusuzuma ibintu byinshi byingenzi kugirango barebe imikorere yibicuruzwa, umutekano no kubahiriza. Ibi bintu birimo guhuza ibicuruzwa, ingaruka zibidukikije, umutekano nibisabwa kugirango amategeko abigereho, imikorere n'ibiranga spray, hamwe nibikorwa byiza.
Guhuza moteri
Guhuza ibicuruzwa nicyo kintu cyibanze. Icyuma kigendagenda kigomba guhuzwa nibintu bikora hamwe nibindi bintu bikoreshwa muburyo bwo gukora nta gutera imiti cyangwa kwangirika. Kurugero, moteri zimwe zishobora kwitwara neza cyangwa uburyohe bwihariye, bikaviramo kwangirika kwibicuruzwa cyangwa kunanirwa. Kubwibyo, ababikora bakeneye gukora igerageza rirambuye kugirango bahuze kugirango moteri ihuze nibicuruzwa.
| Ubwoko bwa Propellant |
Ubwoko Bwihuza Ibibazo |
| Imashanyarazi ya hydrocarubone |
Irashobora kubyitwaramo hamwe na solge organic na flavours |
| Imashini ya Chlorofluorocarbon |
Birashobora kuba bidahuye nibintu bimwe na bimwe bya plastiki nibikoresho bya reberi |
| Imashanyarazi ya gaze |
Birashobora kugira ingaruka kumitekerereze ya pH-yunvikana |
Ingaruka ku Bidukikije
Ingaruka ku bidukikije ni ikindi kintu cyingenzi gisuzumwa. Imashini ya Aerosol igira uruhare muri ozone no gushyuha kwisi, bityo abayikora bakeneye guhitamo moteri igabanya ingaruka z’ibidukikije. Kugeza ubu, inganda zirimo gukuraho ingufu za ozone nyinshi (ODP) hamwe n’ubushyuhe bwo hejuru bw’ubushyuhe bukabije ku isi (GWP) kugira ngo hashobore kubaho ubundi buryo bwangiza ibidukikije nka hydrofluoroolefins (HFOs) na gaze zifunze.
Umutekano nibisabwa
Ibisabwa byumutekano nibisabwa nabyo ni ibintu byingenzi. Abamamaza bagomba kuba bujuje amahame y’umutekano n’ibisabwa kugira ngo babone amabwiriza, nka gahunda ya SNAP yo muri Amerika EPA hamwe n’umuryango w’ubumwe bw’ibihugu by’Uburayi. Ibiranga umutekano nkumuriro, uburozi na reactivite nabyo bigomba gusuzumwa neza. Kurugero, moteri ya hydrocarubone nka propane na isobutane irashya kandi bisaba ubwitonzi bwihariye mububiko no gukoresha.
Imikorere no gutera ibiranga
Imikorere na spray biranga bigira ingaruka itaziguye kubakoresha uburambe bwibicuruzwa. Imashini zitandukanye zirashobora gutanga ingaruka zitandukanye za atomisiyonike, igipimo cya spray na spray inguni. Kurugero, moteri ya gazi isukuye mubisanzwe itanga atomisiyoneri nziza nigipimo cyinshi cyo gutera, mugihe moteri ya gaze isunitswe ishobora kubyara spray itose hamwe nigipimo gito cyo gutera. Ababikora bakeneye guhitamo moteri izatanga imikorere myiza ishingiye kubikorwa byihariye byibicuruzwa nibyifuzo byabaguzi.
| Ubwoko bwa Porogaramu |
Basabwe Ubwoko Bwamamaza |
| Ibicuruzwa byawe bwite (urugero, umusatsi, deodorant) |
Imyuka ya gaze ya gazi (urugero, butane, isobutane) |
| Ibicuruzwa byoza urugo (urugero, ibyuma byo mu kirere, ibikoresho byo mu nzu) |
Imashini isunika gaze (urugero, azote, dioxyde de carbone) |
| Ibyiciro byibiribwa (urugero, amavuta yo guteka amavuta, amavuta) |
Shiramo gaze ya gazi (urugero, azote, dioxyde de carbone) |
Ikiguzi
Hanyuma, ikiguzi-cyiza nacyo nikintu kigomba gupimwa muguhitamo icyuma. Imashini zitandukanye zifite ibiciro bitandukanye, kuboneka, no gukemura ibisabwa bigira ingaruka kubiciro byanyuma byibicuruzwa. Kurugero, gukoresha umwuka wifunitse nka moteri irashobora kuba ubukungu kuruta gukoresha gaze yamazi, ariko imikorere yayo ntishobora kuba yujuje ibisabwa mubisabwa bimwe. Ababikora bakeneye gushakisha uburinganire bwiza hagati yimikorere nigiciro kugirango batange ibicuruzwa byiza, bihendutse.
Nigute ushobora gukoresha moteri ya aerosol neza
Umutekano nicyo kintu cyibanze mugihe cyo gukora, kubika no gukoresha moteri ya aerosol. Imashini nyinshi zikoreshwa cyane (urugero, propane, butane, na isobutane) zirashya kandi gufata nabi birashobora kuvamo umuriro cyangwa guturika. Iki gice gisobanura ingamba zingenzi z'umutekano zo kugabanya ingaruka no kurinda abakozi n'ibikoresho.
Umutekano mububiko no gutunganya
Ibidukikije bibikwa: bikonje, byumye kandi bihumeka neza
Irinde ubushyuhe, fungura umuriro nandi masoko yo gutwika.
Sobanura ibyapa nibirango byo kuburira
Gabanya uburyo bwo kubona abakozi batabifitiye uburenganzira
Koresha ibikoresho kabuhariwe hamwe nu miyoboro yo kwimura no gukora.
Gukemura nabantu bahuguwe
Uburyo bwo kubika neza kubisunikisha
| Ubwoko bwimodoka |
Ububiko Ubushyuhe bwo |
kwirinda |
| Hydrocarbone (urugero, propane, butane) |
<45 ° C. |
Irinde ubushyuhe kandi ufungure umuriro |
| Dioxyde de Carbone |
<50 ° C. |
Irinde urumuri rw'izuba |
| Azote |
<50 ° C. |
Irinde ubushyuhe bwinshi hamwe nibidukikije |
Kurinda umuriro no guturika
Ahantu ho gukorerwa no guhunika hagomba kuba hashyizweho ibikoresho bikwiye byo kurwanya umuriro nkibizimya umuriro, ibyuma bizimya umuriro hamwe na sisitemu yo kumena imashini. Ibikoresho by'amashanyarazi hamwe ninsinga bigomba kuba bishushanyije biturika kugirango birinde ibisasu biterwa n’umuriro w'amashanyarazi. Kunywa itabi, gucana umuriro cyangwa ibindi bikorwa bitanga umusaruro birabujijwe kubikwa no gukoresha ahantu.
Ikiburanwa: Butane propellant yuzuza umuriro wibiti ningamba zo gukingira
Shyiramo ibikoresho byamashanyarazi biturika no kumurika
Koresha amagorofa ayobora hamwe n'imyenda y'akazi irwanya static.
Koresha ibikoresho bihagije bizimya umuriro hamwe na sisitemu yo kurwanya umuriro.
Kora imyitozo isanzwe yo gukumira umuriro no guturika hamwe nimyitozo yihutirwa.
Ibikoresho byo kurinda umuntu ku giti cye (PPE)
Ibikoresho byo kurinda umuntu ku giti cye (PPE) nuburyo bwingenzi bwo kurinda abakozi ingaruka zishobora guterwa na moteri ya aerosol. Mugihe gikoresha moteri, abakozi bagomba kwambara PPE ikwiye, nka anti-static igifuniko, gants zo gukingira, ibirahure byumutekano nibikoresho byo kurinda ubuhumekero.PPE igomba kugenzurwa no kubungabungwa buri gihe kugirango irebe ko yujuje ibyangombwa byumutekano. Abakozi nabo bagomba guhugurwa mugukoresha neza no gufata neza PPE.
PPE ibyifuzo byabashoramari batandukanye
| Ubwoko bwa Propellant |
Basabwe PPE |
| Amashanyarazi |
Igifuniko cya Antistatike, gants zo gukingira, ibirahure byumutekano, ibikoresho birinda ubuhumekero |
| Chlorofluorocarbons |
Imyenda ikingira imiti, gants zo gukingira, guhumeka neza |
| Imyuka ihumanye |
Gants zo gukingira, ibirahure byumutekano, ibikoresho birinda ubuhumekero nibiba ngombwa |
Sisitemu yo gucunga umutekano
Gushiraho inzira z'umutekano
Kora amahugurwa yumutekano w'abakozi
Tegura gahunda yo gutabara byihutirwa
Gukora igenzura ryumutekano buri gihe no gusuzuma ingaruka.
Shishikariza abakozi kugira uruhare rugaragara mu gucunga umutekano
Menyesha vuba ibyago byumutekano cyangwa impanuka
Umwanzuro
Guhitamo no gukoresha moteri ya aerosol bigira ingaruka zikomeye kumikorere y'ibicuruzwa, ingaruka ku bidukikije n'umutekano w'abakoresha. Nkuko igitekerezo cyiterambere rirambye kimaze kumenyekana cyane, iterambere ryibidukikije byangiza ibidukikije, umutekano kandi bikora neza bya aerosol byabaye ikintu cyambere mubikorwa byinganda. Muri byo, tekinoroji ya aerosol idafite moteri (Bag-on-Valve, BOV muri make) iragenda yitabwaho cyane nkigisubizo cyambere.
Ariko, kugirango ukoreshe neza ibyiza bya tekinoroji ya BOV, ni ngombwa guhitamo ibikoresho byuzuye byuzuye. Ni muri urwo rwego, Isakoshi ya Weijing kuri mashini yuzuza valve aerosol iha abayikora amahitamo meza nibikorwa byiza kandi byizewe. Kugira ngo umenye byinshi, hamagara Weijing ubungubu.
