YUKEN叠加式液控单向阀部分常规型号参考：MPA-01-2-40 , MPA-01-2-4001 , MPA-01-4-40 , MPA-01-4-4001 , MPB-01-2-40 , MPB-01-2-4001 , MPB-01-4-40 , MPB-01-4-4001 , MPW-01-2-40 , MPW-01-2-4001 , MPW-01-4-40 , MPW-01-4-4001