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

通过模拟得到了带孔网和无孔成形球面件时不起皱成形极限线。

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、换热器、孔流量计、水泵、微压计、温度计等仪器设备组成封闭式冷却塔实验台。