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發(fā)布時(shí)間: 2012-11-5 16:57
正文摘要:實(shí)際定速特性曲線是由制造廠通過實(shí)驗(yàn)測定的。 (1)離心泵都用后彎葉片,其Q—H曲線趨勢下傾。由于葉片出口角的不同,曲線形狀可分為三類: 1.陡降形(高比轉(zhuǎn)數(shù)) 1) ... |
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