GB/T 12459  弯头 DN 40-5.5490ES

DN 40-5.54 90ES

WN 50(A)-10 RF RF6 RF S=6F 5010=6/@b50F5 h=126

WN20-150 RF Sch60200/=Y fum-2.html-2

SO 250(B)-10 RF

NB/T47021FM600-1.6s6mpamp6-1

B WN750-150 RF 80 /150h/ch400.0-1.03

1 M 500-1.6

PL 15(B)-25 RF D.25R-16 RF0FSch8/JF5

SO 350(B)-10 RF

BI