湖南快乐十分开奖走势图 www.rfck.net

尺寸: 2 1/2'', 2 3/4'', 3'', 3 1/2'', 4'', 4 1/2'', 5'', 5 1/2'', 6'', 8'', 10'', 10 3/4'';

长度: 1m-6m;

螺纹: 2 3/8"API Reg, 2 7/8" API Reg, 3 1/2" API Reg, 4 1/2" API Reg, 2 3/8" API IF, 3 1/2" API IF; BECO 6'', BECO 8'';

壁厚: 4mm-16mm;

技术支持 英铭科技