... 空的，缺乏的；空隙，气孔，空腔，空穴，空位；汽泡，空泡；无效的 void 无效力 void and of no effect 空泡面积份额，孔面积份额 void area fraction ...
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Any proposals for, additions to, or modifications of this agreement, absent written agreement by an authorized person employed by SNC to the contrary, are void and shall have no effect.
任何对此协议的补充或修改建议，如没有由SNC聘请的授权人的书面协议，均为无效。
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