碳(tan)氫清(qing)(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)(ji)是一(yi)種(zhong)用(yong)(yong)(yong)于清(qing)(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)機械設(she)備和工業設(she)備的(de)化學清(qing)(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)(ji)。使(shi)(shi)(shi)用(yong)(yong)(yong)碳(tan)氫清(qing)(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)(ji)需(xu)要(yao)(yao)(yao)注意(yi)以(yi)下幾點：1.確(que)認(ren)清(qing)(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)(ji)的(de)適(shi)(shi)用(yong)(yong)(yong)范圍：不同的(de)清(qing)(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)(ji)適(shi)(shi)用(yong)(yong)(yong)于不同的(de)材質(zhi)和設(she)備，使(shi)(shi)(shi)用(yong)(yong)(yong)前需(xu)要(yao)(yao)(yao)確(que)認(ren)清(qing)(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)(ji)的(de)適(shi)(shi)用(yong)(yong)(yong)范圍。2.確(que)認(ren)清(qing)(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)(ji)的(de)濃度(du)：清(qing)(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)(ji)的(de)濃度(du)過高或過低(di)都會影響(xiang)清(qing)(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)效(xiao)果，需(xu)要(yao)(yao)(yao)按照(zhao)(zhao)(zhao)說(shuo)(shuo)明書上(shang)的(de)濃度(du)比例(li)進(jin)行(xing)調配。3.確(que)認(ren)清(qing)(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)(ji)的(de)使(shi)(shi)(shi)用(yong)(yong)(yong)方(fang)(fang)(fang)法(fa)(fa)：清(qing)(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)(ji)的(de)使(shi)(shi)(shi)用(yong)(yong)(yong)方(fang)(fang)(fang)法(fa)(fa)也會影響(xiang)清(qing)(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)效(xiao)果，需(xu)要(yao)(yao)(yao)按照(zhao)(zhao)(zhao)說(shuo)(shuo)明書上(shang)的(de)使(shi)(shi)(shi)用(yong)(yong)(yong)方(fang)(fang)(fang)法(fa)(fa)進(jin)行(xing)操(cao)作(zuo)。4.確(que)認(ren)清(qing)(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)(ji)的(de)安(an)(an)全性：清(qing)(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)(ji)是一(yi)種(zhong)化學物質(zhi)，使(shi)(shi)(shi)用(yong)(yong)(yong)時需(xu)要(yao)(yao)(yao)注意(yi)安(an)(an)全，如佩(pei)戴防護手(shou)套(tao)、口罩等。5.確(que)認(ren)清(qing)(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)(ji)的(de)環(huan)保(bao)性：清(qing)(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)(ji)的(de)排放(fang)會對環(huan)境(jing)造成影響(xiang)，需(xu)要(yao)(yao)(yao)選擇(ze)環(huan)保(bao)型的(de)清(qing)(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)(ji)，并按照(zhao)(zhao)(zhao)規定(ding)的(de)方(fang)(fang)(fang)法(fa)(fa)進(jin)行(xing)處理。總之，正確(que)使(shi)(shi)(shi)用(yong)(yong)(yong)碳(tan)氫清(qing)(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)(ji)需(xu)要(yao)(yao)(yao)注意(yi)清(qing)(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)(ji)的(de)適(shi)(shi)用(yong)(yong)(yong)范圍、濃度(du)、使(shi)(shi)(shi)用(yong)(yong)(yong)方(fang)(fang)(fang)法(fa)(fa)、安(an)(an)全性和環(huan)保(bao)性等方(fang)(fang)(fang)面，以(yi)確(que)保(bao)清(qing)(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)效(xiao)果和安(an)(an)全性。碳(tan)氫清(qing)(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)(ji)能夠(gou)快速溶解油脂(zhi)和污(wu)垢，同時對金屬表面具有保(bao)護作(zuo)用(yong)(yong)(yong)，防止腐蝕。工業碳(tan)氫清(qing)(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)(ji)用(yong)(yong)(yong)途

選(xuan)(xuan)擇(ze)碳(tan)氫(qing)清(qing)(qing)洗劑(ji)的(de)供(gong)(gong)(gong)應(ying)商(shang)(shang)(shang)(shang)時(shi)，需(xu)(xu)要(yao)(yao)(yao)注意以(yi)下幾點：1.產(chan)品(pin)質(zhi)(zhi)量：首(shou)先要(yao)(yao)(yao)確保(bao)供(gong)(gong)(gong)應(ying)商(shang)(shang)(shang)(shang)提(ti)供(gong)(gong)(gong)的(de)碳(tan)氫(qing)清(qing)(qing)洗劑(ji)質(zhi)(zhi)量符合國家相(xiang)關標準，且無(wu)毒(du)無(wu)害(hai)，不會(hui)對環境和(he)人體造成危害(hai)。2.供(gong)(gong)(gong)應(ying)能(neng)力(li)：選(xuan)(xuan)擇(ze)供(gong)(gong)(gong)應(ying)商(shang)(shang)(shang)(shang)時(shi)需(xu)(xu)要(yao)(yao)(yao)考(kao)慮(lv)其供(gong)(gong)(gong)應(ying)能(neng)力(li)，包括(kuo)(kuo)生產(chan)能(neng)力(li)、庫(ku)存能(neng)力(li)、物(wu)流能(neng)力(li)等，以(yi)確保(bao)能(neng)夠及(ji)時(shi)供(gong)(gong)(gong)應(ying)所需(xu)(xu)的(de)碳(tan)氫(qing)清(qing)(qing)洗劑(ji)。3.價格合理：價格是(shi)選(xuan)(xuan)擇(ze)供(gong)(gong)(gong)應(ying)商(shang)(shang)(shang)(shang)時(shi)需(xu)(xu)要(yao)(yao)(yao)考(kao)慮(lv)的(de)重要(yao)(yao)(yao)因素之(zhi)一，需(xu)(xu)要(yao)(yao)(yao)根據市場行情和(he)產(chan)品(pin)質(zhi)(zhi)量來確定合理的(de)價格，以(yi)避免過(guo)高或(huo)過(guo)低(di)的(de)價格影(ying)響到產(chan)品(pin)的(de)質(zhi)(zhi)量和(he)供(gong)(gong)(gong)應(ying)能(neng)力(li)。4.服(fu)(fu)(fu)務質(zhi)(zhi)量：供(gong)(gong)(gong)應(ying)商(shang)(shang)(shang)(shang)的(de)服(fu)(fu)(fu)務質(zhi)(zhi)量也是(shi)選(xuan)(xuan)擇(ze)的(de)重要(yao)(yao)(yao)因素之(zhi)一，包括(kuo)(kuo)售前咨詢(xun)、售后(hou)服(fu)(fu)(fu)務、技術支持等，需(xu)(xu)要(yao)(yao)(yao)選(xuan)(xuan)擇(ze)有專業團隊和(he)完(wan)善服(fu)(fu)(fu)務體系的(de)供(gong)(gong)(gong)應(ying)商(shang)(shang)(shang)(shang)。5.信譽(yu)度(du)(du)：選(xuan)(xuan)擇(ze)供(gong)(gong)(gong)應(ying)商(shang)(shang)(shang)(shang)時(shi)需(xu)(xu)要(yao)(yao)(yao)考(kao)慮(lv)其信譽(yu)度(du)(du)，包括(kuo)(kuo)企(qi)業資質(zhi)(zhi)、品(pin)牌出名度(du)(du)、客戶口碑等，以(yi)確保(bao)選(xuan)(xuan)擇(ze)的(de)供(gong)(gong)(gong)應(ying)商(shang)(shang)(shang)(shang)是(shi)值(zhi)得信賴的(de)。嘉(jia)定除膠碳(tan)氫(qing)清(qing)(qing)洗劑(ji)品(pin)牌碳(tan)氫(qing)清(qing)(qing)洗劑(ji)具有低(di)毒(du)、低(di)臭的(de)特點，使用起來非常(chang)安全，不會(hui)對人體健康造成傷害(hai)。

碳(tan)氫(qing)(qing)清(qing)(qing)(qing)洗(xi)(xi)劑(ji)(ji)是一種新型的清(qing)(qing)(qing)洗(xi)(xi)劑(ji)(ji)，相(xiang)比傳統(tong)的水基(ji)清(qing)(qing)(qing)洗(xi)(xi)劑(ji)(ji)，具(ju)有以下優(you)點(dian)(dian)：1.清(qing)(qing)(qing)洗(xi)(xi)效(xiao)果更(geng)(geng)好：碳(tan)氫(qing)(qing)清(qing)(qing)(qing)洗(xi)(xi)劑(ji)(ji)可(ke)以有效(xiao)地(di)(di)去除油污、脂肪和(he)(he)其他污垢，清(qing)(qing)(qing)洗(xi)(xi)效(xiao)果更(geng)(geng)好。2.清(qing)(qing)(qing)洗(xi)(xi)速度(du)更(geng)(geng)快：碳(tan)氫(qing)(qing)清(qing)(qing)(qing)洗(xi)(xi)劑(ji)(ji)可(ke)以快速地(di)(di)清(qing)(qing)(qing)洗(xi)(xi)表(biao)面(mian)，節(jie)(jie)省時間和(he)(he)人力成(cheng)本(ben)。3.不(bu)(bu)會腐蝕(shi)：碳(tan)氫(qing)(qing)清(qing)(qing)(qing)洗(xi)(xi)劑(ji)(ji)不(bu)(bu)會腐蝕(shi)金屬表(biao)面(mian)，不(bu)(bu)會對設備造(zao)成(cheng)損害。4.環(huan)保安全：碳(tan)氫(qing)(qing)清(qing)(qing)(qing)洗(xi)(xi)劑(ji)(ji)不(bu)(bu)含有害物質(zhi)，對環(huan)境和(he)(he)人體無害，符合環(huan)保要求。5.使(shi)用(yong)(yong)壽命更(geng)(geng)長(chang)：碳(tan)氫(qing)(qing)清(qing)(qing)(qing)洗(xi)(xi)劑(ji)(ji)使(shi)用(yong)(yong)壽命更(geng)(geng)長(chang)，不(bu)(bu)易揮(hui)發，可(ke)以多次使(shi)用(yong)(yong)，節(jie)(jie)約成(cheng)本(ben)。綜上所述，碳(tan)氫(qing)(qing)清(qing)(qing)(qing)洗(xi)(xi)劑(ji)(ji)相(xiang)比傳統(tong)的水基(ji)清(qing)(qing)(qing)洗(xi)(xi)劑(ji)(ji)具(ju)有更(geng)(geng)好的清(qing)(qing)(qing)洗(xi)(xi)效(xiao)果、更(geng)(geng)快的清(qing)(qing)(qing)洗(xi)(xi)速度(du)、不(bu)(bu)會腐蝕(shi)、環(huan)保安全和(he)(he)使(shi)用(yong)(yong)壽命更(geng)(geng)長(chang)等(deng)優(you)點(dian)(dian)，因此在工業清(qing)(qing)(qing)洗(xi)(xi)領域得到了廣(guang)泛應用(yong)(yong)。

碳(tan)氫(qing)(qing)(qing)清(qing)(qing)洗(xi)(xi)(xi)劑(ji)是一種常見的(de)清(qing)(qing)洗(xi)(xi)(xi)劑(ji)，主要用于清(qing)(qing)洗(xi)(xi)(xi)機(ji)械(xie)設(she)備和(he)零(ling)部件。它(ta)的(de)主要成(cheng)(cheng)(cheng)(cheng)(cheng)分(fen)是烷烴和(he)芳香烴，這(zhe)些化(hua)合(he)物在使(shi)用過(guo)程中(zhong)會(hui)揮發到(dao)空氣(qi)中(zhong)，可(ke)(ke)能(neng)會(hui)對環(huan)境和(he)人體健康造(zao)(zao)成(cheng)(cheng)(cheng)(cheng)(cheng)一定的(de)影(ying)(ying)響。首先(xian)，碳(tan)氫(qing)(qing)(qing)清(qing)(qing)洗(xi)(xi)(xi)劑(ji)的(de)揮發性會(hui)導致(zhi)空氣(qi)中(zhong)的(de)有(you)(you)機(ji)物濃度升高，可(ke)(ke)能(neng)會(hui)對空氣(qi)質量造(zao)(zao)成(cheng)(cheng)(cheng)(cheng)(cheng)影(ying)(ying)響。其次，這(zhe)些化(hua)合(he)物在水(shui)(shui)(shui)(shui)中(zhong)難以(yi)分(fen)解，可(ke)(ke)能(neng)會(hui)對水(shui)(shui)(shui)(shui)體造(zao)(zao)成(cheng)(cheng)(cheng)(cheng)(cheng)污(wu)染。此外(wai)，如果碳(tan)氫(qing)(qing)(qing)清(qing)(qing)洗(xi)(xi)(xi)劑(ji)沒有(you)(you)得到(dao)妥善(shan)處理，可(ke)(ke)能(neng)會(hui)對土壤(rang)和(he)地(di)下水(shui)(shui)(shui)(shui)造(zao)(zao)成(cheng)(cheng)(cheng)(cheng)(cheng)污(wu)染。因(yin)此，為了(le)減少(shao)碳(tan)氫(qing)(qing)(qing)清(qing)(qing)洗(xi)(xi)(xi)劑(ji)對環(huan)境的(de)影(ying)(ying)響，應該(gai)采取以(yi)下措(cuo)施(shi)：1.盡(jin)量減少(shao)使(shi)用碳(tan)氫(qing)(qing)(qing)清(qing)(qing)洗(xi)(xi)(xi)劑(ji)的(de)量，避免(mian)浪費。2.在使(shi)用碳(tan)氫(qing)(qing)(qing)清(qing)(qing)洗(xi)(xi)(xi)劑(ji)時，應該(gai)盡(jin)量在通風良好(hao)的(de)地(di)方進(jin)行，避免(mian)揮發物濃度過(guo)高。3.在清(qing)(qing)洗(xi)(xi)(xi)完成(cheng)(cheng)(cheng)(cheng)(cheng)后，應該(gai)妥善(shan)處理廢液和(he)廢棄(qi)物，避免(mian)對環(huan)境造(zao)(zao)成(cheng)(cheng)(cheng)(cheng)(cheng)污(wu)染。4.可(ke)(ke)以(yi)考慮使(shi)用更環(huan)保(bao)的(de)清(qing)(qing)洗(xi)(xi)(xi)劑(ji)，如水(shui)(shui)(shui)(shui)性清(qing)(qing)洗(xi)(xi)(xi)劑(ji)等(deng)。總之，碳(tan)氫(qing)(qing)(qing)清(qing)(qing)洗(xi)(xi)(xi)劑(ji)在使(shi)用過(guo)程中(zhong)可(ke)(ke)能(neng)會(hui)產生有(you)(you)害廢物，但只要采取適(shi)當(dang)的(de)措(cuo)施(shi)，就(jiu)可(ke)(ke)以(yi)減少(shao)對環(huan)境的(de)影(ying)(ying)響。碳(tan)氫(qing)(qing)(qing)清(qing)(qing)洗(xi)(xi)(xi)劑(ji)可(ke)(ke)以(yi)清(qing)(qing)洗(xi)(xi)(xi)汽車內飾，減少(shao)異味，提高車內空氣(qi)質量。

碳(tan)氫(qing)(qing)清(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)的(de)(de)(de)(de)pH值(zhi)(zhi)(zhi)對清(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)效(xiao)果(guo)有一定的(de)(de)(de)(de)影響。一般來(lai)說(shuo)，碳(tan)氫(qing)(qing)清(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)的(de)(de)(de)(de)pH值(zhi)(zhi)(zhi)越低(di)，清(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)效(xiao)果(guo)越好(hao)。這是因為(wei)低(di)pH值(zhi)(zhi)(zhi)的(de)(de)(de)(de)碳(tan)氫(qing)(qing)清(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)可以(yi)更(geng)好(hao)地溶解(jie)油污和(he)污垢，同(tong)時(shi)(shi)也可以(yi)更(geng)好(hao)地去除表(biao)面的(de)(de)(de)(de)氧化(hua)物(wu)(wu)和(he)腐蝕(shi)物(wu)(wu)，從(cong)而(er)達(da)到更(geng)好(hao)的(de)(de)(de)(de)清(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)效(xiao)果(guo)。然而(er)，過低(di)的(de)(de)(de)(de)pH值(zhi)(zhi)(zhi)也會對被(bei)清(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)物(wu)(wu)體(ti)(ti)造成損害，特(te)別是對于金屬材料來(lai)說(shuo)，過低(di)的(de)(de)(de)(de)pH值(zhi)(zhi)(zhi)會導致腐蝕(shi)和(he)氧化(hua)，從(cong)而(er)影響清(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)效(xiao)果(guo)和(he)被(bei)清(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)物(wu)(wu)體(ti)(ti)的(de)(de)(de)(de)使用(yong)壽命(ming)。因此(ci)，在選(xuan)(xuan)擇(ze)碳(tan)氫(qing)(qing)清(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)時(shi)(shi)，需要根(gen)據被(bei)清(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)物(wu)(wu)體(ti)(ti)的(de)(de)(de)(de)材料和(he)清(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)要求來(lai)選(xuan)(xuan)擇(ze)合(he)適的(de)(de)(de)(de)pH值(zhi)(zhi)(zhi)。總之，碳(tan)氫(qing)(qing)清(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)的(de)(de)(de)(de)pH值(zhi)(zhi)(zhi)對清(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)效(xiao)果(guo)有影響，但(dan)需要根(gen)據具(ju)體(ti)(ti)情(qing)況來(lai)選(xuan)(xuan)擇(ze)合(he)適的(de)(de)(de)(de)pH值(zhi)(zhi)(zhi)，以(yi)達(da)到更(geng)佳的(de)(de)(de)(de)清(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)效(xiao)果(guo)和(he)保護被(bei)清(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)物(wu)(wu)體(ti)(ti)的(de)(de)(de)(de)目的(de)(de)(de)(de)。碳(tan)氫(qing)(qing)清(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)的(de)(de)(de)(de)干燥速度快，能夠迅速去除殘留物(wu)(wu)，提(ti)高(gao)生產效(xiao)率。湖南專(zhuan)業碳(tan)氫(qing)(qing)清(qing)(qing)(qing)(qing)(qing)洗(xi)(xi)(xi)(xi)(xi)劑(ji)用(yong)途(tu)

碳(tan)氫清洗劑可以清洗汽車的變速箱和(he)傳動軸(zhou)，提高換(huan)擋順暢度和(he)耐久性。工業碳(tan)氫清洗劑用(yong)途

碳氫(qing)清(qing)(qing)洗(xi)劑(ji)(ji)的(de)主要(yao)成(cheng)(cheng)分是烷(wan)(wan)(wan)烴(jing)(jing)類(lei)化合(he)物(wu)，如(ru)正(zheng)庚烷(wan)(wan)(wan)、正(zheng)癸烷(wan)(wan)(wan)、正(zheng)十二烷(wan)(wan)(wan)等(deng)。這些(xie)化合(he)物(wu)都是由碳和氫(qing)組成(cheng)(cheng)的(de)，因此(ci)被稱(cheng)為(wei)碳氫(qing)化合(he)物(wu)。這些(xie)化合(he)物(wu)具有良(liang)好(hao)的(de)溶解性和揮發性，可以(yi)快速(su)地清(qing)(qing)洗(xi)各種(zhong)表面上的(de)油污(wu)、脂肪、污(wu)垢等(deng)物(wu)質。除(chu)了烷(wan)(wan)(wan)烴(jing)(jing)類(lei)化合(he)物(wu)，碳氫(qing)清(qing)(qing)洗(xi)劑(ji)(ji)還可能包含其(qi)他成(cheng)(cheng)分，如(ru)氯化烴(jing)(jing)、芳香烴(jing)(jing)、醇類(lei)等(deng)。這些(xie)成(cheng)(cheng)分可以(yi)增(zeng)強清(qing)(qing)洗(xi)劑(ji)(ji)的(de)清(qing)(qing)潔(jie)效(xiao)果，但也可能對環(huan)境和人體健康(kang)造(zao)成(cheng)(cheng)一(yi)定(ding)的(de)危害。因此(ci)，在使用碳氫(qing)清(qing)(qing)洗(xi)劑(ji)(ji)時(shi)(shi)，需要(yao)注(zhu)意保護好(hao)自己的(de)身體和環(huan)境。建議在通風良(liang)好(hao)的(de)地方使用，并避(bi)免(mian)長時(shi)(shi)間接觸和吸(xi)入清(qing)(qing)洗(xi)劑(ji)(ji)。同時(shi)(shi)，也要(yao)注(zhu)意正(zheng)確(que)的(de)儲存和處理方式(shi)，避(bi)免(mian)對環(huan)境造(zao)成(cheng)(cheng)污(wu)染。工業碳氫(qing)清(qing)(qing)洗(xi)劑(ji)(ji)用途(tu)