More often, all of the materials exposed to the etchant have a finite etch rate.通常, 所有暴露在刻蚀剂中的材料都具有一定的刻蚀速率.Hydrofluoric acid of Porcelain Etchant and phosphoric acid of UNI - ETCH are severe eye and tissue irritants.瓷酸蚀剂...
One onlooker had to be restrained by police.一个旁观者遭到了警察的制止。We cannot remain a passive onlooker to the hysteric moves of the enemies.我们不能对敌人目中无人的行动坐视不理.By the time the ambulance arrived, a crowd of onlooker had gathered.救护...
Futhermor the relationship of Xd, Xq and E 0 with constant - torque and contant - power operation are analyzed.分析了电机关键参数Xd 、 Xq 和E0对系统运行性能的影响.XD - JB 1.1 style is non - automatic - controlled piston glue pump.1型属于它控式活塞胶水...
逻辑学在这里是作为单独一门课来讲授的.Logic is taught here as a separate subject.亚里士多德创立了逻辑学.Aristotle founded the science of logic.所有科学, 包括逻辑学和数学在内, 都是有关时代的函数.Aloscience, logic and mathematics included, is a function of the epoch....