Drones can achieve high-resolution image acquisition, which not only compensates for the shortcomings of satellite remote sensing often unable to obtain images due to cloud cover, but also solves the problems of traditional satellite remote sensing such as long revisit cycles and delayed emergency response.

Although there are many types of hair dryers, their structures are similar and similar, all composed of a shell, handle, motor, fan blade, electric heating element, wind deflector, switch, power cord, etc.