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Results:
petroleum refining : 1）石油精製
petroleum engineering : 1）石油工学
petroleum liquid : 1）石油
petroleum gas : 1）石油ガス
petroleum department : 1）石油部
petroleum : 1）石油
petrous bone : 1）（解剖）錐体骨
petrochemical : 1）石油化学製品 2）石油化学[製品]の
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petroleum refining

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