GB/T 12459  偏心异径管 DN 1100×15-Sch20RE50RF S╕п═�4.020δ0=

DN 1100×15-Sch20 RE50RF S╕п═�4.020δ0=

20592 WN150-40RF/nvoke)-

WN50(B)-16FM S=3c6rfs

WN 250-25 FF5 K=4F260l300-16rfRJFM S00bl

耳座 C5pa

3 M 300-4.0 Оҙ0=100.6H8010 RF Sch40 H1=u6Mn

LWN50-900 RF/50 RF1m11.6/505 b=3=4

2 RF 1000-0.2520δ1=16