GB/T 12459  弯头 DN 100-Ⅱ-690EL0ch40060

DN 100-Ⅱ-6 90EL0ch40060

BL15-300RF60/SFBL0.RF Sch40S

WN80-300 RF S=10;a

wn100-150 rf/9 GL100-3/u0009 BL300-63

470213 FM 600-1.006 RFF150

JWN 50×80 (B)-16 RF S=53150RF b=2f

WN 500-150 RF S=12pampRF300M.5 RF SRF-16 R

WN200 B-40RF6 RF-250-600RJa

WN