high-low limit

例句：

1. 1.The temperature is within the high andlow limits of 20°Cto 30°C.
   温度在20°C到30°C的高限和低限之间。
2. 2. Theproject has a high-low limit of500 meters.
   该项目的海拔高度限制为500米。
3. 3. Thecompany's production capacity has a high-low limit of 100tons per day.
   公司的生产能力每天最高限量为100吨。