drawpoint brow是什么意思

用法例句

Secondly, experiments are carried out to study the granular flow characters considering the size of drawing hole, size of grain and type of material by index grain method.

分析了影响散粒体流动性能的因素,采用标志颗粒法进行了崩落矿岩散粒体流动性能试验,主要考虑的因素有放矿口大小、散体颗粒的粒径以及不同的散体材料。

The ore-drawing courses under different ore-drawing-hole spacing are studied with computer simulation.

利用计算机模拟研究了不同放矿口间距下的放矿过程。