I
• The string hangs freely from two points of supp or t .
II
• There are no points of reference ( or reference points ) against which the changes in elevation could be measured.
I
• The string hangs freely from two points of supp or t .
II
• There are no points of reference ( or reference points ) against which the changes in elevation could be measured.
Циммерман М., Веденеева К.. Русско-Английский научно-технический словарь переводчика. Russian-English scientific dictionary for translators. 2012