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hydrauger

1、水力螺旋钻

... 水力利用 harnessing; 水力螺旋钻 hydrauger; 水力落煤楔 stook-and-feather; ...

2、水力钻

...动力钻 power drill强力钻 powerful drill水力钻 hydrauger ...

hydrauger hole水冲钻孔;水力钻孔

hydrauger method水冲钻孔法

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