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装药长度
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装药长度
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装药长度
爆破工程中,将每个炮孔的设计炸药量全部装入孔内时所占有该炮孔的长度。通常用符号表示。
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National Police Agency of Japan
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National Population and Health Scientific Data Sharing Service Platform
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National Population Development Plan(2016—2030)
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National Portable Forestry Machinery Quality Supervision and Inspection Center
National Portrait Gallery
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national prejudice
national preparedness guidelines
national primary frequency standard
national primary measurement standard in chemistry
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national primary scale topographic maps
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National Professional Standards for Sports Broker
National Program for Acquisitions and Cataloging
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