NB/T 47021  法兰 RF 500-1.6 δs=104 rf 1JsRF@F000R60h=3

1 RF 500-1.6 δs=104 rf 1JsRF@F000R60h=3

BL 65-150 RF

DN500-PN10 PL RF I

B WN 32"-900 RF B=800

HP-3-10-1080ampampampampampampampampamp

PJ/SE 350(B)-25 RF S=4.5

WN200(B)-300RF

wn400-600 rfsch802FM2Mch6012h.8000.6d

WN25(a)-63mRF-f/500RJfM

WN 40B)-