“Hallinger shield”的概念、定义、翻译、参考文献-科学参考

单词	Hallinger shield
释义	Hallinger shield [`hal·in·jǝr ´shēld] ^{MINING ENGINEERING} A tunneling shield valuable for working in very soft ground; incorporates a mechanical excavator and does not entail the use of timbering to protect the miners.
随便看	pancreozymin pan crusher pancytopenia panda Pandanaceae Pandanales Pandaridae pandemic pandermite Pandionidae Pandora pandurate pane panel panel board panel code panel coil panel cooling panel display panel heating panel length panel point panel system panel wall panendoscope

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