The most drilling machines are equipped with mechanisms, permitting not only drilling, countersinking and reaming, but also cutting female threads with the help of taps. Both universal and special-purpose type radial "drills are built.
3. Ответьте письменно на вопросы
– What processes does metal undergo before it is formed into the required shape?
– How are the machines which perform this work called?
– What is the most common machine-tool in any workshop?
– What are the main parts of a lathe?
– What is the automatic lathe?
– How do we call a worker, skilled in the use of a lathe?
– What machine-tools that works on plane surfaces, do you know?
– What do the drilling machines drill?
– Where are the threads milling machines used?
– What are the main types of lathes?
– What is the most convenient and efficient machine?
– What are the most drilling machines equipped with
Литература из общего перечня литературных источников
[6, 80-82]