GB/T 12459  同心异径管 DN 50×25-9RCh=1c H1540-1 RF25RF-1

DN 50×25-9 RCh=1c H1540-1 RF25RF-1

3 rf 1400-1.0(b)

WN 350-1500 RJ

PL32-150 RF

WN 200(B)-25 RF S=6 C=32 H=82

WN80(B)-150Mc

3 c-fm900-6.4F srf14n 20mp10d=8�0

WN65(B)-25RF

so 32(B)-25RF

3 RF 800-2.5-60ch40 s40 MRF d=56H806M500NRF000800 RF/ch80S012