销售跟单，销售助理，业务跟单，业务助理，这4个词用英语怎么说？

Question

请问：销售跟单，销售助理，业务跟单，业务助理，这4个词用英语是怎么说的？
谢谢！

Answer 1

销售跟单 Sales order , sales invoice
销售助理 Sales assistant
业务跟单， marketing order, sales and purchase order.
业务助理 marketing assistant , merchandise assistant

Answer 2

销售跟单，销售助理，业务跟单，业务助理
sales order,sales/marketing assistant,business order,business/merchandiser assistant

Answer 3

With the single-sales, sales assistant, with the single-business, business assistant