external turning tool of lever design

例句：

1. 1. The company's headquarters are locatedin the city center, which is anexternal location.
   公司的总部位于市中心，这是一个外部地点。
2. 2. The research was conducted on asample of 500 people,which is an external group.
   这项研究对500人进行了调查，这是一个外部群体。
3. 3. The new product is designed forthe external market, which means it willbe sold outside the company's borders.
   新产品是为外部市场设计的，这意味着它将在公司边界之外销售。