PTR ROOTS BLOWER 1roots blower with hige accuracy,good performance and reliable operation 2roots blower with long service life PTR Roots BlowerPTR three-blade roots blower is widely used for pneumatic conveying system,in many kinds of industries such as procelain,building materials,paper making,smelting,power,petroleum,chemical ,textiles,aquaculture,sewage treatment,food,etc.But it doesn't apply ...