Tell the foundry to cast another piston.
告诉铁间再
一只活塞。
Tell the foundry to cast another piston.
告诉铁间再
一只活塞。
Benzylic ether phenolic resin is one of the main components of foundry polyurethane binder; its structure and preparation condition determine the performances of polyurethane binder.
苯醚型酚醛树脂是造用聚氨酯
的主要成份之一,它的结构及
成工艺条件决定了该类
性能。
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