In order to put into effect new criterion of stucco gypsum JC/T 517-2004,vacuum absorptive device has been designed.

Study on Vacuum Suction Process for Complicated Thin-walled Aluminum Alloy Castings;

A Thin wall intricate aluminium alloy housing was casted with vacuum suction,and the casting was poured with three different filling velocities: 25mm/s,40mm/s and 25mm/s fill 6 seconds,then 40mm/s,X-ray was used to detect the mentallurgical quality of these castings.

This article elaborated the "inductive jet" principle of air current and the application in draining water accumulated in the factory,explained the feasibility and practicability of using vacuum absorption as the power supply to drain water automatically in the enterprise.

The redundant control theory was applied in the vacuum absorption system of wall cleaning robot,and its feasibility was analyzedt,hen a model was established.