HG/T 20592  法兰盖 BL 150-6 RFf-

bl150()-6rff-

DN32-PN25 BLf2-4RF08000/ sR150 RF-10

DN700-PN2.5 WN RF I

2 FM 600-2.520

LWN 50-300 RF

pl50(a-16 rf 22ذ،ز¸ذ²â€“ز—

wn200-25 rf1s3125B-f

WN80-1500RF0c3B=2

wn15-10fmп╟п÷п╒п┴п╟п▒я┌б∙б≤п╟п÷я┌б