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A nanometer (nm) is a unit of spatial measurement that is 10-9 meter, or one billionth of a meter. It is commonly used in nanotechnology, the building of extremely small machines.
only one frame of a movie film among the whole EMS..!
...remembering the experiment: a movie film wheel can be stretched 2500 miles from CALIFORNIA to ALASKA to describe the length of the entire EMS!
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