现寄上第789号销售确认书一式两份，请签退一份供我方存档。
We are sending you our Sales Confirmation No. 789 in duplicate, one copy of which please sign and return for our file.
现寄上第789号销售确认书一式两份，请签退一份供我方存档。
We are sending you our Sales Confirmation No. 789 in duplicate, one copy of which please countersign and return for our file.
现寄上第789号销售确认书一式两份，请签退一份供我方存档。
We are sending you our Sales Confirmation No. 789 in duplicate, one copy of which please countersign and return for our file.
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