多项选择题
A.IEEE802.3ah B.IEEE802.3av C.IEEE802.3b D.IEEE802.3bh
A.EC4B B.GC4B C.EC8B D.GC8B
A.GSCA B.HD32A C.IUPA D.HG1A
A.HSWA B.GSCA C.XG8A D.XACA
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