• Special taps are to be marked with the letter 5 enclosed in a circle ( or with a circled letter S ).
• Letters within circles ...
• Special taps are to be marked with the letter 5 enclosed in a circle ( or with a circled letter S ).
• Letters within circles ...
Циммерман М., Веденеева К.. Русско-Английский научно-технический словарь переводчика. Russian-English scientific dictionary for translators. 2012