We've always specialised in making very robust, simply designed machinery.我们一直专注于制造极为结实耐用而且设计简单的机器。In the United States small specialised bookshops survive quite well. The same applies to small publishers.美国的小型专业书店经营状况不错。小型出版社也是如此。Different countries specialised in different products.不同国家专门生产不同的产品。