GB/T 12459  弯头 DN 80-290ELM

DN 80-2 90ELM

pl25(a)-40RF f1=fm/ AMSE/2.5 rf= b=360Sch20RFlRF

BL550-16RF@RF@J/.615�150 RF0RFbc

wn100(b)-16mfm=6

4 B3656 RF&

pl32(a)-16 rf /u00c3/u00a4/u=F

PL80 (B)-16 RF tR=10;amp;amp;amp;ampeqid=afb38585

BII 35098

pl3500-10rf2@F R300 RF

bi 1283GS