GB/T 12459  弯头 DN 65-590ELmp@a

DN 65-5 90ELmp@a

WN 15-900 RF Sch40f0 RF050 Rb)-10rf05F1100-16rh80

wn250-150fm0s H1=9F(A

SO 300(B)-25 FMF..5

BL 200-25 RF

WN 32(B)-10 RF

BL 200-16 RF

WN 300-150rf

BL65-16 RF

BL 200-10 RFH40S@t.5 RJ RFpLT�1@3b� BB-6@ RJ250FBB5 R5 RJFSf sch2S5 RJ65