双乳被老汉揉搓A毛片免费观看_狂猛欧美激情性XXXX大豆行情_亚洲AV午夜福利精品一区二区_欧美大片aaaaa免费观看

專業(ye)生產銷(xiao)售低(di)溫鋼(gang)彎頭，低(di)溫鋼(gang)三(san)通， 低(di)溫(wen)鋼(gang)異徑管，低(di)溫(wen)鋼(gang)管帽，低(di)溫(wen)鋼(gang)彎(wan)管，低(di)溫(wen)鋼(gang)法蘭，低(di)溫(wen)鋼(gang)管

執行標準,美標(biao)ASME/ANSIB16.9,GB12459,GB/T13401，SH3408，SH3409，GB/T14383

低溫鋼(gang)管(guan)件材質(zhi)ASTM A420WPL3/WPL6/WPL8,09MnNiD,16MnD,16Mn, 16MnDR，Q345D,Q345E

低(di)溫鋼管：ASTM A333GR3，A333GR6，A333GR8，A333GR7，A333GR11, 09MnNiD，Q345D,Q345E

法蘭鍛件：ASTM A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2