The outer-body diameter of the plunger is cut just under production tubing drift to provide the maximum seal while the plunger moves fr eely.

当柱塞自由移动时，柱塞的外体直径刚好能够满足生产油管内径密封需求，提供最大的密封保障。

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The results show that posterior height of vertebral body and Upper antero-posterior diameter of vertebral body are positive allometry.

结果表明，椎体后高、椎体上矢径呈正异速生长。

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At the same time, reduce the diameter of the rolling body in order to reduce the centrifugal force.

同时，减小滚动体的直径，以降低其离心力。

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Keeping their tunnels at approximately one body length in diameter seemed to ensure that the ants could catch themselves when they slipped and allowed the creatures to continue to dig.

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One approach might be to say that in order to be considered a major planet, a body needs to be larger than a certain diameter.

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The brass-plated body has a 'real-feel' pen diameter of nine milimetres and is coated with quality soft-touch rubber.

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