正本的已签字的贸易发票一式三份吗？的翻译：Original trade three copies of the invoices that have been signed yet? 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

The signed original of the invoice in triplicate trade it?

Original trade three copies of the invoices that have been signed yet?

The principal edition has signed trade receipt triplicate copy?

Is this the trade has already been signed by 3 copies of a invoice?

Original trade three copies of the invoices that have been signed yet?