HG/T 20592  法兰盖 BL 500-25 FFF)-1½1=6=175fmsrfch14

BL 500- 25 FFF)-1½1=6=175fmsrfch14

WN50-900 RF Sch200 S=5 rf l=3/

PL20-16RF

3 G 800-2.5 δ0=12

BL350-10RF TSsc RF0 RF Sch40 RF Sch40 S=10-16 RF-RF0 Su00850RF0)-25ch4014M0 RFD RFm80SF.

DN80/PN10/01B.6-1.0F80FM700-1F SCH80FB)-10

WN 300-2500 RJ A=2730c