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every month
everytime that it is turned on
Every 4 Years Every 4 Years
You should have all of your soldiers medically fitted for hearing protectors and have your soldiers' hearing checked ANNUALLY by medical personnel.
You should not have to. If you do it means you have a problem.
five years
You should get your floor machines serviced once every other year. They require regular upkeep in order to last a very long time.
A lubricant. In machines, some kind of oil is often used.A lubricant. In machines, some kind of oil is often used.A lubricant. In machines, some kind of oil is often used.A lubricant. In machines, some kind of oil is often used.
Some ice machines are designed to fit into a freezer while other, often larger ice machines are designed to stand on their own. Some freezers come with ice machines pre-installed.
they use simple machines for everything and every where.
Not very often!
Jet engines are not calibrated as such but get routine maintainance depending on the flying hours of the engine. They also undergo major overhaul and preformance runs during their life. But i think calibrate is the wrong term.