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for subject
Oil / petroleum
containing
O-O
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crown-o-matic
天车防碰装置
crown-o-matic
防碰天车
(crown saver)
lack o£ side wall fusion
焊接缺陷
侧壁熔融不足
metal o-ring
金属密封圈
O-dichlorobenzene
邻二氯苯
R&O type oil
防锈抗氧型润滑油
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