A closely related concept is that of free valence.
一个密切有关的概念是自由价。
Otherwise inhibition efficiency increase with the increase of summation of free valence in pyridine ring.
而随着吡啶环自由价之和的增加，缓蚀效率提高。
Otherwise inhibition efficiency increase with the increase of summation of free valence in pyridine ring.
而随着吡啶环自由价之和的增加，缓蚀效率提高。
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