... performance,reliable operation 2.roots blower with long service life, easy maintenac PTR Roots BlowerPTR three-blade roots blower is widely used ... ,paper making,smelting,power,petroleum,chemical ,textiles,aquaculture,sewage treatment,food,etc.But it doesn't apply to transport ... life,simple structure and easy maitanenance.The whole blower including the accessories is standardized,which allows mass ...