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There are two types of standards - primary and secondary.

Atomic clocks are primary standards, and their rate cannot be adjusted.

Scales are defined based on a specific set of primary standards.

Scales are defined by a specific set of primary standards.

The set of limits based on human health is called primary standards.

The primary standard we use is that athletes get their degrees.

This is why an atomic beam can be used as a primary standard.

It is prepared using a standard substance, such as a primary standard.

Some of the primary standards that focus on digital material are:

A primary standard is usually under the jurisdiction of a national standards body.