NB/T 47021  法兰 RF 650-1.6/600-2MSch40wn150-150 C=c

1 RF 650-1.66002MSch40wn150-150 C=c

WN50-1500 RF SCH40S/.6 δ

5 M 500-1.60RF-108iiRF S51/t216

WN50-150 RFа�

Wn 20-900 RjR0)-16RFrf s

SO125(B)-40 RF0tra

pl 300b-10RF09�

SO 65-10RFB)-15

PL150(B)-6rf0900RF122800-S/

pl 400(b)-16 tR64-1400spampF/fd=1