GB/T 12459  弯头 DN 800-Sch4090EL6 B=e2bs

DN 800-Sch40 90EL6 B=e2bs

PL 150(B)-10 RF b=50

wn40(b)-40 rf s=60

WN 100(A)-10 RF S=4.5

BL450-16 RF AH4 RFB2F6RFRF r

耳座 B5 δ3=8F=10

a 1000RF6sT RF Sc

BL700(B)-16 RF70-200 Sc

WN40-150 RF S=4 H1=83 C=28 D=1.0/B)S66）-

3 CFM 1600-0.6 ГҺВҙu�à