GB/T 12459  弯头 DN 40-490EL=6

DN 40-4 90EL=6

3 M 450-1.6 δ592Mfm/F0=400

21520PL500(B)-10RF0RF/ S

pl150-25rf

PL450(B)-10 RF

pl400-6 ff/F0-150rf500S0F

WN80-150 RF Schf

2 WN40-25RFBf6=01æ³âpaM16r0RF40

SO4"-150 RFM2FS=4ch10S=3S=3FS=3F

SO10(B)-40M0-s/@=/ampampamp2-20ampa