然后，分析了信用卡运作体系的网络外延性等特征以及三项主要原则。
Then it analyzes the network externalities of structure and its three principle rules.
这种双边保证是信用证独特的、具有代表性的特征。
This bilateral security is the unique and characteristic feature of the letter of credit.
这种双边保证是信用证独特的、具有代表性的特征。
This bilateral security is the unique and characteristic feature of the letter of credit.
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