GB/T 12459  等径三通 DN 250-Ⅱ-4TS1805RFF0(55EL=2-4/T

DN 250-Ⅱ-4 TS1805RFF0(55EL=2-4/T

PL200-16RF0)-1

WN300B-63Rf3-

3 RF 1100-6.4 δ0=1M RF S

WN 10-300 RF Sch10Sf3s=rf b=1 c=17A=534 LF

WN 20-300 RF S=8F t1smpampamp

PL400(B)-10RF6 RF RFRF16 RFf6

1 RF 650-1.0 δs=120

wn400-10rf sch

BL50-10RFF¢/ b5006RF