GB/T 12459  异径三通 DN 750×750×20-Sch20TRFr ST Sc

DN 20×20×750-Sch20 TRFr ST Sc

2 FM 1200-1.6 δ1=10

BL150-300 RF

WN 20(B)-100 RF S

BL450-16 RF

DN 150-Ⅱ-5 180ES

WN 80(B)-10 RF S=5

WN400-600RJ

20615 BL 25-150 RF05вҖҷРТSF sch000-0.6&ampampa

DN 125-Ⅱ-5 90ES�4a10RF0/00-B)-2.5(6�RFF25RFF3