The circular tube grouting test was made by the established model of grouting slurry tube in rock mass and using piston type grouting pump commonly used in grouting engineering.

通过建立岩体中灌浆管状模型，利用灌浆施工中常用的活塞式灌浆泵，进行了圆管模型灌水(浆)试验。

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The water pump and fan's using is driving flux circular flow, and the need of heating and cooling.

在系统中水泵、风机的作用是驱动流体的循环，以满足民用和工业中的供热、供冷的需求。

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The pump cover is provided with a cooling wash fluid circular loop inside. The pump cover is provided with a distributing ring.

泵盖中设有冷却冲洗液循环回路，在泵盖上装有分配环。

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To make a gadget called the Can Pump N' Pour, a circular hard plastic ring with a rubber cover that keeps the fizz in opened soda cans, Davison engineers went through 30 different versions with its own moldmaking machines before getting the shape right.

FORBES: Inside InventionLand