USL：
abbr.
吊挂货物(Under-Slung Loads);水下音响实验室(Underwater Sound Laboratory);超编待用人员名册(Unemployed Supernumerary List)
双语例句：
1.USL can provide systems for both simple and complex applications.
USL提供的设备系统都可用于简单和复杂的物质检测。
2.USL is the appearance layer of the model.
用户服务层是模型的表现层。
3. USL's range of PC-based ultrasonic equipment is specifically designed to meet these needs.
