A-A+ The _____ discharge a nearly constant amount of liquid regardless of pressure. 2020-09-18 20:31:24 资格考试 阅读 问题详情 A.mixed-flow pumpB.axial-flow pumpC.centrifugal pumpD.displacement pump请帮忙给出正确答案和分析,谢谢! 参考答案 查看解答