并提出按管内压头来改变开孔面积的布孔方法，以便保证用于低水头滤池时布水的均匀性。
A method of arranging orifices with varied opening area according to the pressure variation in the pipe is suggested in order to ensure the uniformity of water-distribution in the low head filter.
并提出按管内压头来改变开孔面积的布孔方法，以便保证用于低水头滤池时布水的均匀性。
A method of arranging orifices with varied opening area according to the pressure variation in the pipe is suggested in order to ensure the uniformity of water-distribution in the low head fi...
文章介绍了针对不同矿岩条件进行的凿岩爆破工艺及3种典型布孔方法，并在实践中加以调整运用，取得了显著成效。
The paper introduces the rock blasting technology and 3 kinds of blast hole distribution suitable to different rock, and its remarkable application effect in practice.
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