汽油是一种能去掉油污的有溶解力的液体.Gasoline is a solvent liquid which removes grease spots.因为,其实溶解力 、 大量的普遍性存在,以及持久性,才是“弱之胜强,柔之胜刚”的真实原因.The reasons of penetrating stone are solvency, large proportion of ubiquity and duration.正丁醇对硝化纤维素具有...
My life seems to be in a groove. I do the same things day after day.我的生活似乎很单调, 日复一日地干着同样的事情.The bevel milling cutter for cutting groove of oil casing - pipes was designed.设计了用于油气田管道坡口切割的角度铣刀.A grooving machine is develop...