S-SL系列单向节流S-SLSeriesthrottlevalve型号（model）S-SL4-M5/M6S-SL4-01/02/03S-SL6-M5/M6S-SL6-01/02/03/04S-SL8-01/02/03/04S-SL10-01/02/03/04S-SL12-01/02/03/04)