GB/T 12459  弯头 DN 40-690EL

DN 40-6 90EL

WN 100-40 RF1F

1M600-10 RF15 sch

BL 12"-300 RF в@.5� â€�

pl25-10rfk=750 RF Sch120 S=3.5@b=fs2@RF@4 RchF@443RF@A

WN125B)-16RF0RF050-150 RF065

PL 500(B)-10 RFRF6Sc2@RF@443RF@0 RFB)-16

21521 BL500-40Mδ=52

BL(S)450-10FF

SO250-1