HG/T 20592  法兰 PL 400-6 RFhg=t205921002hgcadذ“ز“ذ–’ذ“ز¶ذ²ز–ز

WN15-900 RF S=B=76 S=16 f10-

pl400-6rfhg=t205921002hgcadذ“ز“ذ–’ذ“ز¶ذ²ز–ز

pl65-10 rf b¬Â¦ampam4�Бт•˜а�o

WN25(A)-25RF S=3 AA150 RF/ H805-0 RF RF

pl200b)-40 rfFb)-2=3 S

DN50/PN10/11B Sch40SFh40s=10ch405RF R

BSO450