481. Payment by irrevocable letter of credit is convenient for us and we shall draw a 60d/s bill in your bank.

不可撤消的信用证的支付方式对我方来说比较方便，所以我方将向你方银行开立见票后60天付款的汇票。

482. We will draw you a documentary draft at sight through our bank on collection basis.

我方将通过我方银行以托收的形式开出跟单即期汇票向贵方收款。

483. Our terms of payment are 30-day credit period, not 60-day credit. It’s customary.

我方的付款期是30天、不是60天。这是惯例。

484. As usual, we should require of you an L/C to be issued through a first-rate bank.

同往常一样，我们要求你方通过一流银行开出信用证。

485. It would be advisable for you to establish the covering L/C as early as possible enable us to effect shipment in due time.

我方建议贵方尽早开立有关信用证，以便我方及时发货。