The horizontal bed is the foundation member which supports the headstock , tailstock, and carriage.卧式床身是基础构件,用来支承床头箱 、 尾座和拖板.Clutch in headstock makes the lathe start smoothly and brake quickly.在车头离合器使车床顺利启动和制动迅速.Radial ...
She lubricates her hands with a lotion.她用一种洗剂来滑润她的手.This oil lubricates the machine.这种油使机器润滑.Dry Mouth Saliva lubricates the mouth, dehydration reduces the amount available.口腔唾液顺利口干 、 脱水量可削减....
Nefedipine was synthesized with m - Nitrobenzaldehyde, ethyl acetoacetate ammonium acetate.以间硝基苯甲醛, 乙酰乙酸乙酯,氨化试剂为原料.Fructone was synthesized from ethyl acetoacetate and glycol using activated carbon supported phosphotungs...