HG/T 20592  法兰 PL 20-16 FF0fm10r0

pl20-16ff0fm10r0

WN 50-300 T S=106 RFRF H.

bL25(B)-10 RF0SRjT3406-.4r=1/mpampaF9S=4.5/MF7f0

WN 550(B)-40 RFS=14Fum61

WN 500-10 RF=.

WN 500-600 RF t1F-16 RF/

bi 500-s/fh12/(805âfRwn3-1

DN65/PN16/02&32B

WN 100(B)-16 RF S=5=4.5F200-1.016 RF-2.5800

WN 6