30*50*2.5精拔方管,150x150,900×900×10.0~50精拔方管精拔方管- 面议 30*30*1.5精拔方管,400*400*15精拔方管,120*120*9精拔方管精拔方管- 面议 25MG钢管货源,220*220*8精拔方管,WB36、SA106B钢管精拔方管- 面议 20CrMo钢管,130X130,50X70精拔方管- 面议 15NiCuMoNb5钢管,485X485,15MnV钢管精拔方管- 面议 T11钢管,130x70,535X535精拔方管- 面议