GB/T 12459  弯头 DN 50-Ⅱ-590EL5SF158 RF PS

DN 50-Ⅱ-5 90EL5SF158 RF PS

47021 M600-0.6

BL1000-16RF0s70210200-160

WN 12"-600 RF Sch40S

3 RF 1800-2.5 δ0=12

WN500(B)-40 RF S=20

ASME B16.5 WN 350-600 RF-8FRFSCH

BL 250(B)-25 RF S=10

PL 80(B)-25RF00 RF(BfSM� Sch40S=8 Sch@RFF-1F

BL25-600 Rj