17、销售确认书Sales confirmation
18、销售合同Sales contract
19、定单Order
20、定货单Purchase order
21、装箱单Packing list
22、许可证licence
23、出口许可证export licence
24、进口许可证import licence
25、一式两份in duplicate
26、一式三份in triplicate
27、一式四份in quadruplicate
28、单据，文件document
29、跟单信用证documentary credit
30、汇票 draft
