English to Bulgarian Tech/Engineering Engineering (general) Precision measuring tools, Metrology

In various contexts of science, technology, and manufacturing (such as machining, fabricating, and additive manufacturing), an indicator is any of various instruments used to accurately measure small distances and angles, and amplify them to make them more obvious.

http://en.wikipedia.org/wiki/Indicator_(distance_amplifying_...

http://www.starrett.com/metrology/metrology-products/precisi...