HG/T 20615  法兰盖 BL 500-300 RF sch40s

BL 500-300 RF sch40s

SO 3"-600 RFh46G5 RJScF&@�88896MnR RF0FMJBc��250 LM

pl50(a)-40mRF rf

pl150-6rf-16 RF5 RJrfSHรฏล�

WN50-150 RF5920f-

SO 50(B)-16 RF K

wn100(b)-300fm b=2S=4.

SO 25-150 RF8e RF206���h40ShRF5 RJcM�6R

WN 400