Stone cage net protective structure is in itself under the action of gravity for the installation.
石笼网防护结构是在其本身重力的作用下进行安装的。
Automatic water sluice gate is under the waterpower and action of gravity, in the given water height condition; and it start and stop automatically as the flux change.
水力自控闸门是借助水力和重力作用，在一定的水位条件下，随流量的变化，自动启闭的自动化闸门。
Based on the mechanics of wave, the expression of water wave propagation velocity under the action of gravity is deduced and the effect of surface tension on small wave is analyzed.
本文根据波动理论推导出在重力作用下波的传播速度表达式，分析了微小波动中表面张力的作用。
Natural gas in wellbore is a mixed gas consisting of various gas. Due to molecular weight of all kinds of gas is different, they will occur gravity segregation under the action of gravity field.
井筒内的天然气都是由多种气体组成的混和天然气，由于气体各组分的分子量不同，会在重力场作用下发生重力分异，从而使井筒内混和气体的性质与单一气体有很大差异。
Natural gas in wellbore is a mixed gas consisting of various gas. Due to molecular weight of all kinds of gas is different, they will occur gravity segregation under the action of gravity field.
井筒内的天然气都是由多种气体组成的混和天然气，由于气体各组分的分子量不同，会在重力场作用下发生重力分异，从而使井筒内混和气体的性质与单一气体有很大差异。
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