GB/T 12459  弯头 DN 50-Ⅱ-490ESز�755-RRF

DN 50-Ⅱ-4 90ESز�755-RRF

wn150(a)-100rf0-1.0

B WN 900-150 RF SCH10 A=914

PL200(b)-16RF RF/4&amp

WN 600(B)-16 FF S=6.02

WN100(B)-16 RFch160 FF Ⅱ

wn0-150RF1-40 L=31910 F

PL80(A)-16 RF ذ“ز“Fr

Wn50-150rfFc00Jh40amp

WN200-25RF-1.0rf s=4.5s1