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Plastics
containing
化学的
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Chinese
English
有实际经验的化学家
practical chemist
物理
化学的
表面活性
粘接面经表面预处理
physicochemical surface properties
螺栓的化学锁紧法〈用单组分胶黏剂、厌氧剂防止螺栓松动〉
chemical screw locking
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