GB/T 12459  偏心异径管 DN 300×10-Ⅱ-6RERE0393e300

DN 300×10-Ⅱ-6 RERE0393e300

BL25(B)-25 T1700-RF0.-1610

BL 100-300 RF Sch40S Sch80Si00/6200Squ4 S

WN450B)-16RF/b)-ch140F25ELR

PL32(B)-6FF K=9/5

WN25-300 RF S63/mo2/u00c3/data

NB/T47022 RF2600-0.25

WN 150-150 RF/foRF710- K=3

3 M 1600-4.020δ0=

DN500