GB/T 12459  弯头 DN 20-Ⅱ-390ESpampampampamp-/7

DN 20-Ⅱ-3 90ESpampampampamp-/7

nb/t47022 RF900-1.

A WN1300-150RF S=8/)00-20ScF S=2073190RF6

pl 200(B)-6 rf

TPB-3=6.1.5s-1d)-0a-15

pl300(b)-16 rf c=15.61=/F9

WN 200-150 RF800 L S=cM S

so20(b)-40t0/

wn450(b)-40 ff10F=14.5 D=16rfã0s4-1M0mG100

bl80-2