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...

drawbench的音标：drawbench的英式发音音标为：['drɔ:bentʃ]drawbench的美式发音音标为：['drɔbentʃ]...

n.拔管机，拉丝机，拉床...