sale contract 和 invoice是什么意思啊?

sale contract 和 invoice是什么意思啊? Proforma Invoice 和 Contract 有什么区别 B/L,INVOICE,PACKING LIST,CONTRACT各是什么意思? contract of sale 英译汉A contract of sale 请问信用证里的PO date CONTRACT DATE 和PERFORM INVOICE DATE是必须一样么 invoice是什么意思 collective invoice 和commercial invoice有没有差别啊, International sale of goods contract 与Domestic contract的不同 英语翻译Kindly arrange invoice and sales contract covering 1X40f 30% down payment against issuing proforma invoice,Contract s signed commercial invoice in 4 copies indicating contract No