Perlite covering agent 珍珠岩覆盖剂
Leather covering agent 皮革顶层涂饰剂
Copper alloy purified covering agent 铜合金精炼覆盖剂
acid covering agent 酸性覆盖剂
mould covering agent 中间包覆盖剂
riser covering agent 冒口覆盖剂
tundish covering agent 中间包覆盖剂
Said covering agent may be lime and fluorite and said refining agent USES lime, fluorite and aluminium powder as main raw materials.
覆盖剂可以以石灰和萤石、精炼剂，也可以以石灰、萤石和铝粉为主要原料，深度脱氧可使用铝片或镁片。
The invention discloses bulk coal transportation dust covering agent and the usage, which belongs to the dust preventing technology field.
本发明公开了一种散煤运输封尘剂及其使用方法，属于防尘技术领域。
In this paper, how to use the distillation resdues in process of primary amine synthesise organobentonite covering agent and antistatic agent is discussed.
本文主要叙述了如何利用伯胺生产过程中的蒸馏残渣制取有机土覆盖剂和抗静电剂。
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