求翻译：买方应通过卖方可以接受的银行与装运月份前45天开出并送达卖方见票后60天付款的信用证，于装运日后15天在上海议付有效。是什么意思？

The buyer by the seller can accept bank out of the 45 days prior to the month of shipment, and served on the seller 60 days after sight payment letter of credit, 15 days after the date of shipment for negotiation in Shanghai.

The buyer shall, through the seller can accept in the bank and 45 days before shipping out and delivered to the Seller after the 60 day payment credit after 15 days of shipment and payment in Shanghai.

The buyer should the bank and the shipping month which may accept through the seller previous 45 days starts out and delivers the seller at sight latter 60 days payments the letter of credit, 15 days will be in the future effective in shipping in the Shanghai negotiation.

Acceptable to buyer by seller's Bank and shipping months served 45 days before departure and payment 60 days after sight letter of credit by the seller, in Shanghai negotiation and effective in 15 days after the date of shipment.

正在翻译，请等待...