英语翻译求翻译高手,外贸报盘中的payment Payment:By confirmed ,irrevocable L/C payable by draft at 60 d/s to reach us 30 days before the time of shipment.还有一个表述差不多：payment Payment:By confirmed ,irrevocable L/C payable by draft at sight to be opened 30 days before the time of shipment.
问题描述：
英语翻译
求翻译高手,外贸报盘中的payment Payment:By confirmed ,irrevocable L/C payable by draft at 60 d/s to reach us 30 days before the time of shipment.
还有一个表述差不多：payment Payment:By confirmed ,irrevocable L/C payable by draft at sight to be opened 30 days before the time of shipment.
答
付款方式：装运前30天开立凭汇票60天付款的保兑的,不可撤销的信用证.
付款方式：在装运前30天开立 即期保兑的,不可撤销的信用证,