Ren Min, Zhang jia gang, Jiangsu, China,215611
seamless steel tubes, steel pipe, carbon steel pipe, seamless steel pipe, pipe, astma53, astma106, astma178, astma179, astma192, astma210, astma213, astma334, astma333, astma209, astma513, astma519, astma209, astma199, din17175, bs3059, en10305, din1629,
