1. Shell: Increase the outer casing, more durable, explosion-proof, never corroded.
2. Wind turbine: large air volume and low noise.
3. After 90 degree elbow: exhaust from the trench.
TEL:+86-17862818813 +86-15069693966 
TEL:+86-536-3520100 
E-Mail: qzhxwk@hotmail.com
Address:Xijiao Industrial Park, Qingzhou City, Shandong Province
