单侧进水的汽包配水管布置简单，并减少了汽包上的开孔数量，配水管上采用变节距分配孔以保证汽包长度方向上的均匀分流。
One-side arrangement for feed water pipe on drum is simple and the quantity of orifices on drum decreases, it adopts variable pitches in multi-orifices distributing pipe to balance water flow.
果蔬差压通风预冷包装箱的开孔大小及包装箱两侧的压差是影响预冷速度、冷却均匀性的重要参数。
The vent hole size and the pressure drop are the important parameters which affect cooling rate and cooling uniformity in pressure pre-cooling of fruit and vegetable.
在轴对称的实验装置上，对上下施加侧压的中心开孔的含瓦斯煤饼，将孔内压力突然降至大气压，求得煤样在侧压和瓦斯压力联合作用下的临界破坏条件。
The pressure was then suddenly released in order to find out the critical condition of failure under the combined effect of confining pressure and pore pressure.
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