Please, could somebody tell me how to say in Russian "Mechanical Draughtsman" It is a profession, trade. In English means a person who draws and designs mechanical, structural or machine parts. The drawing might be created on a drawing board or computer [ like AutoCad ] Google gives "рисовальщика".
In English language a Draughtsman, or better to say a senior or designer draughtsman is a person who designs and thereafter draws machine parts or structural constructions. As his superior is a chief draughtsman, who might not be an engineer. It is impossible just to draw machine parts, the draughtsman must be able to create something new which is talked in meeting together with an engineer or engineers. Once a draugtsman gets an idea what the customer wants, he is left on his own to design and to draw or to produce a drawing.