air ring material made from quality steel, through well-designed. Resistant to wear, heat resistance, break resistance dual lip air ring sizes is due to customers  requirment .A blown film cooling dual-adjustable air ring air duct installation,...

screw , used for plastic machinery standard length for customer request excellent quality and best price environmental screw used for plastic machineryadvantages as follows:The product introducesCommodity : conical double alloy screwconical double...