题目内容
Balancedvanepumpscanbedesignedasvariabledisplacementpumps.
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Balancedvanepumpsarefixeddisplacementpumps.
Unbalancevanepumpscanbedesignedasvariabledisplacementpumps.
Forvariabledisplacementvanepumps,fluidflowdecreasesaseccentricitybetweenrotorandcamdecreases.
Forvariabledisplacementvanepumps,fluidflowdecreasesaseccentricitybetweenrotorandcamincreases.
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