It can avoid drawing the special holing-through design plan of roadway, and thus the operating efficiency would be improved.
这种方法可以不必绘制专门的巷道贯通设计平面图，从而提高了工作效率。
For a week they struggled through one blizzard after another, holing up in their tents during the worst of the weather.
他们在一场又一场暴风雪中挣扎了一个星期，在最恶劣的天气里躲在帐篷里。
The holding ring and the secondary holing ring are connected through a screw thread.
扣押环与二次扣押环通过螺纹连接。
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