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Sonic Vibration drilling
释义
Sonic Vibration drilling
Encyclopedia
理学
钻进方法
释
Sonic Vibration drilling
声频钻进
以振动频率为50~200赫兹的高频振动为动力的钻进方法。又称声频振动钻进、声波钻进。
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ISSN中国国家中心
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issuance fund
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issue of shares
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Istanbul Declaration On Human Settlements and Habitat Agenda
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