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13165134678升降是一種載人裝置,其安(an)全性非常重(zhong)要。因此,變速器(qi)(qi)具(ju)有(you)三重(zhong)安(an)全保護功(gong)(gong)能:帶(dai)制動(dong)器(qi)(qi)的電動(dong)機、帶(dai)制動(dong)器(qi)(qi)的電機與(yu)減(jian)速器(qi)(qi)之間(jian)的聯軸器(qi)(qi)和具(ju)有(you)自鎖功(gong)(gong)能的蝸(gua)輪蝸(gua)桿減(jian)速機在(zai)制動(dong)失 …
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