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group velocity
group velocity of transmission mode
group ⅥA compound
group ⅥA element
group ⅥB compound
group ⅥB element
group view
group ⅦA compound
group ⅦA element
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group ⅥB compound
➞
group ⅥB compound
Definitions
[1]
[无化]
ⅥＢ族化合物
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group ⅥB compound