Close ramp to starting position, gasexpansion in-base, small base size.
主矿路口离主矿基地很近,主矿有二气,主矿面积小。
2
The different effects of shock wave, gasexpansion pressure, reflected extension wave are put forward.
提出了冲击该、气体膨胀压和反射拉伸波在破岩过程中各自所起的不同作用。
3
Results show that gasexpansion in central region of vortex chamber caused by swirling flow is an important reason for the refrigerating effect of vortex tube.