... -cooler for vertical air supply, could discharge the wind in multi-direction, air can be well-distributed PLASTIC 4 ... -cooler for vertical air supply, could discharge the wind in multi-direction, air can be well-distributed2,Mushroom Plenum ... forming, dimensional accuracy is very high, properties of products is stable, it’s lightsome and intensity3,The rim of Plenum is made of galvanized sheet material, ...