From the garage there came the sound of Derek working a lathe.汽车修理厂那边传来德里克开动车床的声音.Let's get the lathe to turn the new piston.咱们用车床车[加工]新的活塞吧.Gradually she learned to operate a lathe.她慢慢地学会了开车床....
'氰'.''基一种单价基因,''.'氯'. ''化苯乙酮, 存在于简单的和复杂的氰化物中.A univalent radical , CN, found in simple and complex cyanide compounds.降低反应温度,提高了苯乙酮的收率.Thus , this reduced temperature of r...