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 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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Taking type CCB gear pumps, this paper analyzed such characteristics of the circular tooth gear pump as low noise.

本文以CC B型齿轮泵为例，分析了圆弧齿轮泵的低噪声等特性。

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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