GB/T 12459  弯头 DN 400-Sch4090ESrf0 RF S=0-1

DN400-Sch40 90ESrf0 RF S=0-1

PL50B-16RF b=3 D=2

so32b-16rfRF00F Sch40Sch1RF0r9050 RF120L20

PL150-10 RF=RFchcF25ampa

SO 450(B)-10 RFF02=380

JWN 80×125(B)-160 RF S=10

PL 250 -6 RFJ S=60S6RS/7�

SO100(a)-10rf/u00c2/u00a2/data/src/haibo.jpg

IF25-10RF