NB/T 47021  法兰 RF 1000-1.0/20δs=180.

1 RF 1000-1.020δs=180.

BL100-150 RFc4000

PL 300-40 RF MX S/

LWN 80-150 RF B=150 R

PL150(B)-25 RF00M610

WN200-25RFS=12.56156ff0.8 HFh8/.0500(B

PL100(B)-16 RF RF Sch40=320 BB=20

LWN100-150 RF rf SCH80SCH80S-f/@A B

PL150(a)-16RF bF &a

PJ/RJ 300(B)-10 R