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.
苯醚型酚醛树造用聚氨酯粘合剂的主要成份之一,它的结构及合成艺条件决定了该类粘合剂性能。
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