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升降(jiang)是一種(zhong)載(zai)人裝置(zhi),其安全性非(fei)常重(zhong)要。因此,變速器(qi)(qi)具(ju)有(you)三重(zhong)安全保護(hu)功能(neng):帶(dai)制(zhi)動(dong)(dong)器(qi)(qi)的電(dian)動(dong)(dong)機、帶(dai)制(zhi)動(dong)(dong)器(qi)(qi)的電(dian)機與減速器(qi)(qi)之間的聯軸器(qi)(qi)和(he)具(ju)有(you)自鎖功能(neng)的蝸輪(lun)蝸桿(gan)減速機在制(zhi)動(dong)(dong)失 …
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