GB/T 12459  等径三通 DN 250-3TSch40sh3B==0R14.2F=1A=16

DN 250-3 TSch40sh3B==0R14.2F=1A=16

3 FM 500-2.5 δ0=14RF B=16RFFSSCH40S=1

WN80-1500 RF Sch160/h1=18 δn=2

PL300(B)-40 M001/0=4Fmp;aBc

PL350B-10RF80(B-3WNF592

WN 600(B)-10 RF96-40 th00

WN 350-1500 FF SF0RFSpam

WN 1000(B)-63 FF-1501=f6/管��

WN20-6