The surface of cast steel,aluminum,or carbon fiber roll mandrel is coated ceramics layer.After finish machining,the roll surface will be engraved a layer of cell net by laser according to printing fineness,the thickness of ink and so on.Ceramic roll is wi
Cast floating ball valve is produced by casting valve body, casts can reduce the cost in raw material via making mould, also it can reduce the machine cost and save delivery time.
The transmission of the fan is verified by dynamic and static balance. The centrifugal opening system reduces the wind resistance and greatly improves the efficiency ofthe fan.