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1·The part of the contract price shall be paid in USD by way of an irrevocable Letter of Credit against presentation by Contractor to the negotiable bank.

合同价格要根据承包人要求，在议付银行以不可撤销的信用证方式用美元支付。

2·In general, payment will be made by irrevocable letter of credit negotiable against presentation of shipping documents.

关于付款方式，我们一般采用不可撤销的使用凭证，凭货运单证议付。

3·But this price is subject to our final confirmation and the payment must be MADE by a negotiable and irrevocable letter of credit.

但此价格仍须听候本公司最后确认，用可议付及不能取消信用证付款。