The pic is not clear, but it feels like drawbench silver work.图还是看不清, 但感觉是拉丝银工艺.Cold working strain phosphating includes drawbench phosphating, cold extrusion phosphating and cold stamping phosphating.冷加变形磷化主要包括拉丝磷化 、 冷挤...
A well-known broadcaster has been asked to commentate on the opening ceremony of the national games.一位著名的播音员已被请去实况报道全运会的开幕式。...the prominent naturalist and broadcaster, Sir David Attenborough.著名的博物学家兼主持人戴维·阿滕伯勒爵士A well -...
The new traffic rule has come into effect since March.新交通规则自三月份起生效.You should understand the traffic rule by now. You've had it explained often enough.到现在你应该理解这条交通规则了, 已经给你解释得够多了.But please note, you should ride the...