GB/T 12459  弯头 DN 40-490ELS.

DN 40-4 90ELS.

WN80(B)-40 M B=69RF6 m

BL 500-300 RF h=2-1.2.5pampampaS=6/g10=6/c

BL RF 10K 400A26RF2-2ch50FRF0s

WN 15(B)-100 RF S=400(b)-16rH60SRF80 p5

WN20-2500Rj

BL50-1500 RFm

LWN80-1500RJ4 D=519 C=34 f1=2.rfR000-

WN 200-25 RF Sch80

PL300(B)-40FF0