GB/T 12459  同心异径管 DN 400×350-Ⅱ-8RC

DN 400×350-Ⅱ-8 RC

PL 500(B)-6 RF

PL20-16rf/0RFRFS60300 L

BL40-300RF

NB/T47065.2 A5-1100-6 DN=1100 δn=6

wn100-300rf=st

LWN 15-150 RF B=19 H=140

WN 6"-150 RF Sch10S

WN100A-40M S=6

SO 80-150 RF5c2/u10 RF Sch40S�ВёЪ©Г�0SR RF@أ�1.F80sF