GB/T 12459  同心异径管 DN 80×50-Sch40RC δ=3.5hc

DN 80×50-Sch40 RC δ=3.5hc

PL 50(B)-10 fF D=125-116R

BL20-10RF AA=90 S= N0a2

PL400(B)-16 RF0 RF2=125-116R

SP-7-250(b)-1M0B-25rfb)-14f

PL125(B)-16 RF

wn400(b)-300 rf sRFpamRF407FF RJALMJ.5 RJRF06tM0

so150(b)-150rforG/d0 RFm1200-

wn200-300MRF00

WN50(B