GB/T 12459  弯头 DN 100-Sch4045EL46/01

DN100-Sch40 45EL46/01

BL 150-150 RF S=18

WN250-150RF HG/T206

so50-300gsch40 S/

WN 25-150 RF50rF4.H10SF

PL300(B)-10RF900 RF-300 RF

WN65(B)-40FFM0(B/-10

BL200-40 Mfa-0-6.0RF100���fn-RFrFFFR0

bl500-600fmB)-10 RFM1400-1./=5201æF Sch40S

WN900(B)-