“hole director”的概念、定义、翻译、参考文献-科学参考

单词	hole director
释义	hole director [`hōl di´rek·tǝr] ^{MINING ENGINEERING} A steel framework used in underground tunneling to set the angle at which holes for a blasting round are to be drilled.
随便看	duplex cable duplex channel duplex computer duplex deoxyribonucleic acid duplexed system duplexer duplexing duplexing assembly duplex iron duplexite duplex lock duplex operation duplex paper duplex practice duplex prints duplex process duplex pump duplex tandem compressor duplex transmission duplex tube duplex uterus duplicate cavity plate duplicate field duplicate film duplicate genes

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