Seller issues Draft Contract.

卖方给出合同草案。

Buyer returns signed Draft Contract.

买方返回签订合同草案。

When can we have the draft contract ?

请把合同草案过一遍，看有什么问题。

When can we have the draft contract ?

当然可以，我们马上会把合同草案寄给你。

I've brought a draft contract with me.

我带来了一份合同草案。