Bench of closed circuit cooling tower that is composed of boiler ,exchanger, orifice flowmeter, water pump, micromanometer , heat indicator and so on is established.

建立了由锅炉、换热、孔板流量计、水泵、微压计、温度计等备组成的封式冷却塔实。

A non-wrinkling limited graph for spherical surface parts of retiary metal sheet and metal sheet is obtained.

过模拟得到了带孔网板和无孔板成形球面件时不起皱成形极限与板厚的关系曲线。