1Cr5Mo 12Cr5Mo Cr5Mo无缝热压弯头GB/T12459标准 ¥150.00 ASTM T5 P5 12Cr5Mo1弯头90° 45° 1.5D 1D ¥150.00 ASTM T9 P9 Cr9Mo 12Cr9Mo1 12Cr9MoNT弯头ASME 16.9 ¥255.00 1Cr9Mo 12Cr9Mo Cr9Mo无缝热压弯头GB/T12459标准 ¥210.00 1.4301法兰板式平焊法兰带颈对焊法兰化工标准HG/T20592 ¥62.00 PN320尿素合成系统35CrMo法兰高压螺纹法兰HG20256-2016 ¥250.00