... of Machine-Building Industry.3. 4D-SY (3.5-60MPa) Auto-control series features high level of ... that the previous products have, additionally, a drive unit and cross-like converter are added. Therefore, ... , thereby reducing the height of the whole unit and making it more compact and attractive.4 ... 5-60MPa) Auto-control series is to reduce the testing time, has great flow volume. When the pressure is over 1 ...