On the other , many men was excavating the canalage drived by kurbash.
另一个大陆上,很多人在皮鞭驱使下河。
On the other , many men was excavating the canalage drived by kurbash.
另一个大陆上,很多人在皮鞭驱使下河。
A bulldozer was employed for excavating the foundations of the building.
推土机用来给楼房地基。
The technical measures and structure,applied principles of blastproof of ventilation shaft at excavating face,specific operational method and prospective effect are described.
介绍了掘进工作面防炮崩风筒的主要技措施及技
结构、应用原理、采用这项技
的具体操作方法及达到的预期效果。
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