通过键入BillingComponent为付款收集器(Payment Collector)创建第二个属性(部分)，并且添加两个端口。

Create a second property (part) for Payment Collector by typing BillingComponent, and add two ports.

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我们用保兑的，不可撤消的信用证为付款条件。

We insisted on payment by a confirmed, irrevocable letter of credit.

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我们和新的供货商做买卖都用保兑的，不可撤消的以我国货币开立的信用证为付款方式。

We usually deal with new suppliers on the basis of payment in our currency by confirmed irrevocable Letter of Credit.

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