In order to prolong opeating duration of the vaccum system of polyester unit and resolve the problems occurred often in the vacuum system during production, a EG circulating system for heat cleaning, a vacuum intake, a down-flow spout for nitrogen back flushing, and prepolymerization vacuum piping for electrical tracing were added to vacuum system in Zimmer polymerization plant.

Efficiency of vacuum filtration process was determined by slu.

Oil removing efficiencies of vacuum filtration and combustion method are 68.

Mature koji with high quality was prepared by mixing materials with different ratio,and vacuumizing koji before fermentation was developed by which koji mixed with salty water easily,so deleterious bacteria could be restrained because of high concentration of salty water even when fermentation was developed at higher temperature.

This paper introduced the drawbacks in the traditional methods for vacuumizing and oiling the capsule type oil-conservator transformer.

8 K superfluid helium fitting for the system were put forward, including direct throttling, throttling process accompanied with pre-cooling, vacuum pumping and vacuum-pumping accompained with throttling process.

The application of liquid ejector in evacuation System of atmospheric-vacuum Distillation Unit in SINOPEC Tahe Company is described.

Design and Simulation Study of a Vacuum-pumping Deaerating Device for Hydraulic Oil;

A new testing method of vacuum-pumping for bulkiness property of three-dimensional crimp polyester staple fibers was introduced.

5MN/400×400 platen vulcannizing press with of vacuum-pumping the latest design arc expounded, and the application and dissemination of the platen vulcanizing Ptess with vacuum-pumping areprospected.