The mathematical model of water pressure test with steady-pressure and non-stationary three-dimensional flow is proposed by considering the segment action as superposition of numerous point-source actions.

In order to control the rigidity of the finished scroll better,the factors on that effect on the pressure invariableness between scroll and supporting rollers such as diameter, paper's fixed quantity, scroll's radial density were emphasised.

The paper analyzed and investigated the tendencies character in the suppressing process and pressure stability of the hydraulic control system of the brick press.

Analyzes the main factors that influence the pressure stability in side supply airconditioning system, such as pressure control mode, design of static pressure box, testing posi-tion of supply air pressure sensor and the set of pressure value of static pressure box, etc.

Which is the best way of CPAP titration for OSAHS treatment: A,B or C?;

In order to make clear the pathophysiology of the esophageal motor dysfunction of the disease, a comparing study was performed with esophageal manometry and pH monitoring in 90 patients with esophageal carcinoma (EC) including 17 cases of cardia carcinoma (CC) and 56 healthy adult volunteers.