因此，该装置有二个优点：(1)工作压力比一般冲击气缸高，所以能增加输出功。
Therefore, this device has two advantages: (1) the pressure of impact cylinder may be higher than usual, so that the output can be increased.
应用特征线方法，提出了一般冲击机械的波动力学数值计算方法，给出了一液压凿岩机械的数值模拟结果。
Numerical method is proposed for general mechanical impact systems by means of characteristic line theory . Simulation results of hydraulic rock drill are provided .
但这团雾气的的确确是由美国海军从秘鲁海岸起飞的超级大黄蜂所制造出来的，即一般所谓的“冲击领”或“蒸汽锥”，在某些大气条件下飞机在高速飞行时就会产生这种现象。
But this cloud created by a U.S. Navy Super Hornet off the Peruvian coast is known as a 'shock collar' or 'vapour cone', created in certain atmospheric conditions at high speeds.
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