适应于高速公路全天侯连续工作。
It is suitable for all-weather continuous operation of freeways.
比如医护人员，他们不得不全天侯护理被感染的病人。
Doctors and nurses, for example, have to spend all their time with infected patients.
本实用新型结构简单，能够全天侯运行，大大提高了实用性。
The utility model has simple structure, can work in all weather, and improves the practicability greatly.
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