GB/T 12459  弯头 DN 20-590EShch010RF=4/(130/4090-RF scr b=0-1.00000000

DN 20-5 90EShch010RF=4/(130/4090-RF scr b=0-1.00000000

PL 80-16 RFB8 rF60210sbsH=400

PL 65-25M0200(610m8L24fb=3 RF SRF n=12290 K=260 AA=20

PL450(B)-6 RF Mu00bb/

PL 80(B)-16 RFL300( S=1=

PL 80-10 RF-1p-2015p;amp;a

PL450-10RF D=590fbb=720k=S=6F 3 RF

PL