HG/T 20592  法兰 WN 150(B)-160 RF S=42)-63 RF S=4RF@4�FF@443RF06@RF@443oTRF Bsch.@

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WN RF 30K 15A SCH40S

WN250B-63RF S=10.5F ScRJ3.5mp

wn 120(A)-16 RFm8F04@Schrf

wn80(b)-16M

wn80-25 m gb/ff1=1.5RF13

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WN3