To book a repeat order.

再续订一批

Arrange early shipment of this repeat order

尽早安排装运（这批续订货物）

Please, could you confirm me when you go to open the L/C for this repeat order ?

请你开立这次重复订单的信用证时能否给我确认一下？

Our clients are so satisfied with the quality of your sewing machines that we wish to book a repeat order.

我们的顾客如此满意缝纫机的质量以至于我方想要预定续定单。

If the quality of your initial shipment is found (proves) satisfactory, large repeats (repeat order) will follow.

如果你们第一笔运来的货令人满意，随后将有大批续订。