flame retardant and antistatic There are five main characteristics of Taishan PVC Coated Positive Pressure Air Duct for Coal Mine:1,Surface of the air duct is smooth and flat.2,Light in weight and easy for handling.3,Superior flexibility and fold-resistant.4,High rate of broken tensile strength and tear strength, durable and safe.5,Environment-friendly product, dust-free& non odour, do no harm to ...