Leakage rate: 12-hour pressure maintaining test.
泄漏率：12小时保压测试。
Can realize the constant pressure, the two kinds of forming process, can be equipped with pressure maintaining time delay function, adjustable delay time.
可实现定压、定程两种成型工艺，可选配保压延时功能，延时时间可调。
The key technique includes the contact vacuum starter, pressure maintaining equipment for vacuum, the safety control in the vacuum drainage, the design and calculation method for the vacuum drainage.
真空接触启动、真空保压设备、系统安全监控以及系统的设计计算是真空排水系统的技术关键。
The hydraulic system has high efficiency, saving in energy and pressure-maintaining and overload protection functions.
本发明的折弯机液压系统具有高效、节能的特点，还具有保压、过载保护的功能。
The hydraulic system has high efficiency, saving in energy and pressure-maintaining and overload protection functions.
本发明的折弯机液压系统具有高效、节能的特点，还具有保压、过载保护的功能。
应用推荐