GB/T 12459  弯头 DN 450-1490EL

DN 450-14 90EL

WN250(B)-16 RF

BL 4"-300 RF,S4 RF@40@4 RF0 RF20 RF

PL 10(B)-10 RFSR640T1RFRF8@R0 RF120.5-R@W110Mu2.5 RJ-R

bl100-150rf|022cr17ni12mo2/u00c3/u

WN300-300 RJ S=12.7357

3 RF 1300-1.0 δ0=14

WN40-150 RF Sch40

WN10"-300 FM Sch40

WN