Generally choose gesso more boron hydrates, zinccarbide and aluminum hydroxide, magnesium hydroxide.
一般选用结晶水较多的硼化物、锌化物及氢氧化铝、氢氧化镁。
2
U. S. officials said the nine materials covered by their case were bauxite, coke, fluorspar, magnesium, manganese, silicon carbide, silicon metal, yellow phosphorus and zinc.
美国官员指出，这项政策所包含的九种原材料包括铝土岩、焦炭、萤石、镁、锰、碳化硅、结晶硅、黄磷和锌。
3
The invention relates to a silicon carbide particle reinforced type tin, silver and zinc composite solder and the preparation method.