एक मानक इंजीनियरिंग ट्राई स्क्वायर (Try Square) द्वारा माप की सटीकता लगभग कितनी होती है?

For maintaining accuracy, it is important to see that the edges and surfaces of workshop measuring instruments are protected from ____.

Which of the following is a primary function of an engineering try square?

Engineering try squares and high-precision T-squares used in workshops are primarily made of which material to maintain durability and shape?