和外贸函电有关的填空题

Specializing in the export of Chinese Leather Shoes , we wish to express our desire to trade with you_______this line. 填什么？给我解释一下为什么填这个．谢谢！！！

填in，line这里指系列商品之类的意思。

我们专业出口中国皮鞋，非常希望与贵公司在这方面建立业务关系。

we are importers of quality clothing materials,and have large annual needs from our markets in spain. we should be obliged if you would offer us your pattern books showing the complete information of these farics, together with your price list.

in in the line of指的是在哪个行业。 in this line指在这个行业。