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Terms for subject Drilling containing 用 于 | all forms | in specified order only
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专用术语 API 标准定级为1级的用于钻中深直井的钻杆串normal service
用于for
商品名用于封堵气的水泥浆Gasblock
用于小直径管线的由壬ground-seat union
—种滤器中装的用于过滤的细黏土状滤土fuller's earth

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