A customs union has long been talked of ; in the “ northern triangle ” of honduras , guatemala and el salvador , progress is being made on this 关税同盟的事已经讨论了很久了；由洪都拉斯、危地马拉和萨尔瓦多组成的“北方三角”都已经从这一进程中获利了。
The zollverein industrial landscape in land nordrhein - westfalen consists of the complete infrastructure of a historical coal - mining site , with some 20th - century buildings of outstanding architectural merit 位于北莱茵威斯特法仑专区的普鲁士"关税同盟"工业区保留着历史上煤矿工业区的完整结构，那里一些建于20世纪的建筑也展示着杰出的建筑技巧。
Prussia , the leader of the zollverein , utilized the organization to control the middle and small states of germany , push the austria aside and defeat it at last , and then for the first time realized the unification of germany by the small germany road 普鲁士是关税同盟的盟主，它利用该同盟控制了中小邦国，排挤、打败了奥地利的势力，以“小德意志道路”实现了德国的第一次民族统一。
If some countries have a high level of development , the market capacity is little , the trade barriers are low , the linguistic and culture difference are not significant , and if they belong to a same duty union , the intra - industry trade among them would be active 如果各国的平均发展水平(人均收入)较高，发展水平的差距相对较小，市场规模平均较小，贸易壁垒较低，地理的语言和文化的差异较小，而且贸易伙伴同属于一个关税同盟或拥有共同的边界，那么，就可以期望在这些国家中产业内贸易是活跃的。
