HG/T 20592  法兰 SO 500-16 RF0RF B=u=10

SO 500-16 RF0RF B=u=10

WN25B-40 RFFMFM10=m1600-1

wn100-150 rfè„â

SO 300(B)-16RFRF RF-6.-4FF210SFu0

SW100-150RF10chBLwn50-600rf610001.6/65A16 R

WN 14"-150 RF Sch80S-300

wn150B-16m4 S=pam HG/

DN 300-Ⅱ-7 TSchr2t

WN 200-150 RF SCH2020046n

PL20