Two brothers decided to dig a deep hole behind their house. As they were working, a couple of older boys stopped by to watch.
在小房的后面两兄弟俩打算挖一个深坑。正当他们为此劳碌的时候一对年长的二人站在一旁看着他们在那里忙来忙去。
Two brothers decided to dig a deep hole behind their house. As they were working, some older boys stopped by to watch.
有兄弟俩决定在他们房子后面挖一个深洞。就在他们不停地挖洞时，几个年龄大点的男孩在附近停下来观看。
The result shows that ultrasonic vibration drilling could improve the working accuracy and efficiency, and could solve the problems exited in the drilling process of small deep hole.
结果显示，该工艺方法能大幅提高小深孔的加工精度和效率，很好地解决了小深孔加工中存在的难题。
Two brothers decided to dig a deep hole behind their house. As they were working, a couple of older boys stopped by to watch.
有兄弟俩人决定在他们房子后面挖一个深洞。就在他们不停挖洞时，几个年龄大点的男孩在附近停下来观看。
Let me explain. Two brothers decided to dig a deep hole behind their house. As they were working, a couple of older boys stopped by to watch.
有俩兄弟决定在他们房子后面挖一个深洞，就在他们不停地挖掘时，几个年龄大点的孩子在他们身边停下来看热闹。
The method of coal cutting adopts deep-hole blasting and realizes no people in the face, this decreases risk when workers are working in the face.
煤柱回收采用深孔爆破的方法落煤，减少工人在工作面打眼的危险。
Two brothers decided to dig a deep hole behind their house. As they were working, a couple of older boys stopped by to watch.
在小房的后面，两兄弟俩打算挖一个深坑。正当他们为此劳碌的时候，一对年长的二人站在一旁看着他们在那里忙来忙去。
Two brothers decided to dig a deep hole behind their house. As they were working, a couple of older boys stopped by to watch.
在小房的后面，两兄弟俩打算挖一个深坑。正当他们为此劳碌的时候，一对年长的二人站在一旁看着他们在那里忙来忙去。
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