Zinc base die castings are always copper plated in cyanide baths.锌基合金的压铸件总是在氰化镀液中镀铜.It's used for the production of large castings.它用于大型铸件的制备.All lead castings were produced at first by hand in many cases from singl...
The colouring pigments from the skins are not allowed to bleed into the grape juice.外皮上的色素不能渗到葡萄汁里面去。The Romans used natural pigments on their fabrics and walls.古罗马人在织物和墙壁上使用天然颜料。The original white lead pigments have oxi...
They are also under - represented in the upper echelons of management.她们只是上层管理梯队中的少数分子.They are all northwest strikes , echelons and left - lateral strike - slips.它们走向北西, 雁行斜列,左行走滑.Officers were drawn largely from the to...
We have sorted out this wretched business at last.我们最终还是把这件破事儿理顺了。This wretched war has brought misery to millions.这场悲惨的战争为无数人带来了不幸。The pay has always been wretched.薪水总是少得可怜。...
These may bind to receptor molecules on the surfaces of cells.这些可能会在细胞表面和受体分子结合在一起。The volume of gas trapped on these surfaces can be considerable.存留在这些表面的气体体积可能相当大。The two surfaces adhered, and we couldn't get them...