Brand: JWG Material: Stainless steel, seamless or welded Surface: PE, PVC coat Standard: ASTM A269, A213 etc. Type: coiled tubing, straight tubing. 内部基管: 不锈钢管,无缝管或焊管 外表覆盖管: PVC, PE 等 标准: ASTM A269, A213 etc. 钢管类型: 盘管,直管