GB/T 12459  同心异径管 DN 50×40-Sch40SRC S=461S.0vokerF5Ãdat2@P2@Fj@5@F Sc�

DN 50×40-Sch40S RC S=461S.0vokerF5Ãdat2@P2@Fj@5@F Sc�

SO 250-150 RF

NB/T47023 FM800-1.0/54-100

SO 150-150 RF

SO1 1/2"-900 RF

WN 300(A)-40 RFRF5 RJ-16FS0�77.5 R

WN 50-150 RF S=12

3 FM 900-1.0 δ0=16300 RF5 RF S=4 Rch44060fF3RF8Sc2@RF@443RF@