英语语法分析

This paper introduces mainly the construction features of REPM DC servomotors with air-core rotors and their manufacturing technology. Meanwhile, it states their application feild.

介绍了稀土永磁空心杯转子直流伺服电动机的结构特点，空心杯电枢的绕制方法及其制造工艺，同时还介绍了这种电机的主要用途及其优点。

So this novel converter has a wide application and huge economy effect in power converting field, especially in the high voltage and high power feild where IGBT is used as the main switch.

尤其适合以igbt作为主功率开关管的高电压、大功率功率变换，具有广泛的应用前景和巨大的经济价值。

Company Information: We work in the feild of buildings and constructions. We are contractors since 1985. We design and build houses and multi-story buildings. concrete and steel structures...

公司介绍：我们从1985年开始就从事建设工作，主要设计并建造钢筋混凝土的房屋及高楼。