pretanning agent
... presynaptic membrane ==> 突触前膜 pretanning agent ==> 预鞣剂 pretelescope astronomy ==> 望远镜前天文学 ...
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根据不同的特性作为铬鞣助剂、预鞣剂以及与植物鞣剂结合鞣等用途。
Depending on the different characters, it can be used as the chrome tanning auxiliary and pretanning agent, and in combination with vegetable tanning agents.
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