“helper grade”的概念、定义、翻译、参考文献-科学参考

单词	helper grade
释义	helper grade [`hel·pǝr ´grād] ^{MINING ENGINEERING} A grade on which helper engines are required to assist road locomotives. Also known as pusher grade.
随便看	anthracosis Anthracotheriidae Anthracotherioidea anthracoxene anthralin anthranilic acid anthrapurpurin anthraquinone anthraquinone pigments anthrax anthraxolite anthraxylon Anthribidae anthrone anthropic anthropic principle anthropocentric anthropochory anthropodesoxycholic acid anthropogenic anthropogeography anthropogeomorphology anthropography anthropoid Anthropoidea

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