Thanks for the helpful comments.
First, there is a compressed air blower or compressed air duster and the convenience facilities for washing feet are separate.
This is just an example of how to group and tag multiple amenities.
Compressed air dusters, as mentioned, are also used in dusty workplaces and to remove dust and pests from the heads of hiking trails.
These days, it is very common to see sports facilities and leisure facilities just to remove dirt.
There are various types of foot washing facilities.
In the old days, it mainly existed as a facility for simple hand and foot washing.
Since then, there are faucets that have been developed and there are some facilities that allow you to simply wash your hands and feet, and there are facilities that wash sand on your feet as you pass through the water as you can see in the photo.
(I am also wondering if I should group these together or categorize them separately.)

The comments below are well understood and accepted.
Thanks for the good help.

Please let me know if my explanation is lacking or if you have any other questions.