美国生产的分马力和亚分马力电动机有一半以上是由器具生产厂买走。生产这类电动机的厂家很多,据统计,1981年美国有121家,年产量达20亿台以上。另外还有许多非美国公司生产,或者从国外进口。几年前,美国曾担心从日本和其它国家进口电动机可能会扰乱本国工业,可是这种现象没有发生。这部分是由于美国政府采取了进口限额和关税挺坚 More than half of the US-made sub-horsepower and sub-fractional horsepower motors were purchased by appliance manufacturers. There are many manufacturers of such motors. According to statistics, there were 121 companies in the United States in 1981 and the annual output was more than 2 billion. There are also many non-US companies that produce or import from abroad. A few years ago, the United States had worried that importing electric motors from Japan and other countries could disrupt domestic industry. However, this phenomenon did not happen. This is partly due to the fact that the U.S. government has adopted import quotas and strong tariffs.