一式

The document was drawn up in triplicate.

该文件写成一式三份。

We send you herewith two copies of the contract.

们随附上合同一式两份。

They churn out 3 000 identical toy trains every day.

他们每天生产3 000 辆一式一样的车。

Enclosed is our contract No. 345 in duplicate, of which please return us one copy, duly countersign.

随附上345号合同一式两分，请会签并回寄一份。