The forced windcooled rotating sheet roller pump is used as vacuum pump or vacuum-pressure composite air pump.
一种强制风冷旋片滚柱泵，用于制造真空泵及真空压力复合气泵。
2
Oriented to the prevailing wind, the front wall of perforated cardboard, moistened and cooled by a trickle of seawater pumped in, cools and moistens hot air blowing in.