Those little lines on instrument are called markings or readings and make it easier to measure a substance.
What is a Marking?
These are the lines which are usually found on an instrument and signifies the pattern or the appropriate measurement which is contained in it. It is found in measuring instruments such as ruler etc and in some musical instrument.
The markings are usually very accurate so as to ensure that the results gotten are the same in any part of the world. This helps to reduce confusion and other issues which may arise from it thereby making it the most appropriate choice.
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