亚洲AV第二区国产精品,四川少妇搡BBB搡BBB爽爽爽小说,亚洲无码一区二区三区,嫩BBB揉BBBB揉BBBB

pipe fit up equipment

           1+1 twin sections fit up welding station      YG series fit up welding station          HGKZ series fit up welding station

      1st section loaded                2nd section loaded                     1+1 fit up completed            inner circular seam weld   outer circular seam weld