我们确认向贵方购买……，随函附上订单确认书供参照。
We confirm having purchased from you... a confirmation order is enclosed for.
我们确认向贵方购买……，随函附上订单确认书供参照。
We confirm having purchased from you... a confirmation order is enclosed for your reference.
我们确认向贵方购买……，随函附上订单确认书供参照。
We confirm having purchased from you... a confirmation order is enclosed for your reference.
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