通过数值计算，分析了上置式水力驱动控制棒的落棒时间。
The time of dropping rod was analysed by numerical simulation.
上海别克V6发动机配气机构为气门顶置、凸轮轴上置式，以齿形皮带同步传动。
The valve mechanism of the V6engine of passenger car BUICK is overhang valve, overhang camshaft type ad driven synchronized with tooth-shaped belt.
锌铝系合金铸造时出现反常的底部缩孔，而用一般上置式冒口对此类缩孔的补缩效果甚微。
There is abnormal bottom shrinkage in Zn Al alloy castings and top riser has little effect on them.
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