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It is recommended to analyse the oil sample for existence of metal particles.
如果发现磁堵上存在金属物质，则推荐取油样化验。
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You will be given a sample of either caraway oil or spearmint oil.
你将会收到一个葛缕子油或绿薄荷油样品。
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You will be given a sample of either caraway oil or spearmint oil.
你将会收到一个葛缕子油或绿薄荷油样品。
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