It is suggested to apply the principle of effective gravity and equivalent pressure head to calculate the rotational speed and ingate area in the processing of grinding ball by centrifugal casting.

在离心铸球工艺中，可应用有效重度和等效压头原理计算转速和内浇口断面积。

youdao

Gravity drive is effective in the early stages of reservoir development only when there is high relief in the reservoir rock and oil column.

重力驱动仅在储层岩石中存在高闭合度和油柱的情况下在储层开发的早期是有效的。

youdao

Gravity drive becomes effective in the late stages of production on some gas-drive oil reservoirs.

有某些气驱油藏的开采晚期，重力驱动变得有效。

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Liberal Democrat Robert Brown said passing new laws might not necessarily be the most effective way of combating the issue, as attacks on public sector workers were already treated with gravity under existing law.

BBC: Labour debate: protecting the worker