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泵的性能参数主要有()和(),此外还有轴功率、转速和必需汽蚀余量。
泵的性能参数主要有()和(),此外还有轴功率、转速和必需汽蚀余量。
正确答案:流量 扬程
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余量
扬程
转速
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These companies are tending to submit very low offers to gain a foothold in the area.