GB/T 12459  弯头 DN 200-Sch4045ELH60 RF950Mch400

DN200-Sch40 45ELH60 RF950Mch400

PL150(B)-16 RF D=284 bb-40 fm0rfSch8/Fn8m S sch

WN80-150RF B=72/FrF16RF=

2 CT 1800-0.2520δ1=8

wn20-100m s=3

PL 50(B)-25 RF sch.jh16 TR¥أ

wn40(b)-63fm, NB00 RFF S-3@4NF S=≥s)-16

WN40-1500RFSf s7160RFRFch

3 M 1400-