GB/T 12459  同心异径管 DN 80-Sch40RC SCH800ta0h80S.F

DN80-Sch40 RC SCH800ta0h80S.F

lWN50-300 RF b=49

WN150(B)-40 RF S=11

WN25(B)-40 RF S=8

20592 BL 450-10 M400F RF S

WN600(B)-25 RF

DN 200-8 180EL RF Sh4040-sch40�F s

WN 25(B)-40 RF Sch80�â�n-4.0 RF

SO20(A)-25RF/615rf10fm5.

WN 200-150 RF Sch40Suo