英语词汇“unproductive development”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	unproductive development
释义	unproductive development unproductive development [¦ən·prə′dək·tiv də′vel·əp·mənt] (mining engineering) The drifts, tunnels, and crosscuts driven in stone, preparatory to opening out production faces in a coal seam or ore body.
随便看	depth, fear of depth finder depth finders depth-first depth first branch and bound depth-first branch and bound algorithm depth first discovery algorithm depth first end index depth first search depth-first search depth-first spanning tree depth-first traversal depth from motion depth gage exhaust fan, boiler exhaust flame damper exhaust fuel ratio exhaust fume hood exhaust fumes exhaust gas exhaust gas analyzer exhaust-gas analyzer exhaust gas back pressure exhaust gas boiler exhaust gas bypass

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