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Number of lobe of rotor in rotating pump may be two or three.
转子泵的转子叶数可能是两叶或三叶。
youdao
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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。
youdao
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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。
youdao