Please change the terms of payment at sight at sight.

请将即期信用证付款改为即期付款交单方式.

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We ask for full payment at sight.

我们要求全部货物即期付款.

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Check is a payment at sight.

支票为见票即付.

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We ask for full payment at sight because we can guarantee 90 % mechanical efficiency.

我们要求全额即期支付是因为我们能保证90%的机械效率.

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