permanent normal trading relationship的意思|示意
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永久正常贸易关系
permanent normal trading relationship的网络常见释义
永久正常贸易关系 ... 翁萨格倒易关系 onsager reciprocal relations 永久正常贸易关系 permanent normal trading relations (pntr); permanent normal trading relationship; pntr 就发展贸易关系换文 exchange notes on the development of trade ...