Metering method for coal mine underground drilling depth (Chinese)
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2020
- Patent / Electronic Resource
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Title:Metering method for coal mine underground drilling depth
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Additional title:一种煤矿井下钻孔深度计量方法
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Patent number:CN111322060
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Patent applicant:
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Patent family:
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Contributors:WANG XINWEN ( author ) / YAN BIN ( author ) / TIAN XIAOCHAO ( author ) / LIU JINGKE ( author ) / FAN YILIN ( author ) / LIU YAOBO ( author ) / DAI CHENYU ( author )
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Publisher:
- New search for: Europäisches Patentamt
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Publication date:2020-06-23
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Type of media:Patent
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Type of material:Electronic Resource
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Language:Chinese
- New search for: E21B
- Further information on International Patent Classification
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Classification:
IPC: E21B EARTH OR ROCK DRILLING, Erd- oder Gesteinsbohren -
Source: