加人预冷2一8℃的1%多聚甲醛1.0毫升并混匀.Add 2 ~ 8 C 1 % polysorbate 1.0 ml and mix them again.框架安装是聚甲醛树脂制成.The frame mount is made of delrin.并介绍了聚甲醛树脂的特性和主要应用领域.Moreover, the characteristics and the main applied fields of polyacetal res...
One prisoner was still holding out on the roof of the jail.一名犯人仍在监狱的房顶上顽抗。To let the roof leak would be bad husbandry.屋漏不修,不是个好管家(的办法).Overhead, the lights showed the old timbers, used to brace the roof.灯光照亮了头顶上支撑屋顶的旧房梁。...