One of the first recorded uses of a diamond engagement ring was Archduke Maximilian of Austria's proposal to Mary of Burgundy with a ring set with thin, flat pieces of diamonds in the shape of an "M."
关于钻戒使用的最早记录中有一条是奥地利大公马克西米利安向勃垦地的玛丽求婚时，赠与了一个M形又薄又平的钻石镶嵌的戒指。
The practice indicates that all indexes about the plastic ring-set stand of conductive ring accord with the product's operating requirements.
使用表明，该导电环塑料组环座的各项指标均符合产品使用要求。
The practice indicates that all indexes about the plastic ring-set stand of conductive ring accord with the product's operating requirements.
使用表明，该导电环塑料组环座的各项指标均符合产品使用要求。
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