Rotating pump shaft by hands, sure to guarantee easy to rotate.
用手转动泵轴，必须保证运转灵活。
A seal assembly for use with a rotating shaft.
一种用于旋转轴的密封组件。
A rotating shaft inside the 99%-evacuated glass globe has four attached vanes.
一中空玻璃圆柱里有一有四个桨的转轴。
A rotating shaft inside the 99%-evacuated glass globe has four attached vanes.
一中空玻璃圆柱里有一有四个桨的转轴。
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