90°带直段弯管 PN1.6 DN50 20# R=4D
90°弯管R=2D D426*12mm 20# GB/T12459
90°弯管R=6D D377*10mm 20# GB/T12459
90°弯管R=3D D377*10mm 20# GB/T12459
90°弯管R=4D D377*10mm 20# GB/T12459
90°弯管R=2.5D D377*10mm 20# GB/T124
90°弯管R=3D D325*8mm 20# GB/T12459
90°弯管R=2D D325*8mm 20# GB/T12459
90°弯管R=3D D273*10mm 20# GB/T12459
90°弯管R=3D D273*8mm 20# GB/T12459
90°弯管R=3D D219*10mm 20# GB/T12459
90°弯管R=2D D219*10mm 20# GB/T12459
90°弯管R=2D D219*10mm 16Mn GB/T1245
90°弯管R=2.5D D219*8mm 20# GB/T1245
90°弯管R=2D D219*8mm 20# GB/T12459
90°弯管R=3D D219*7mm 20# GB/T12459
90°弯管R=2D D219*6mm 20# GB/T12459
123°弯管R=3D D273*7mm 20# GB/T12459
90°弯管R=4D D159*6mm 20# GB/T12459
90°弯管R=3D D114*5mm 20# GB/T12459