• It is of first importance that the alignment of piston, rod and compressor is absolutely true.
• Of prime ( or singular , or paramount , or critical , or fundamental , or vital ) importance ...
• It is of first importance that the alignment of piston, rod and compressor is absolutely true.
• Of prime ( or singular , or paramount , or critical , or fundamental , or vital ) importance ...
Циммерман М., Веденеева К.. Русско-Английский научно-технический словарь переводчика. Russian-English scientific dictionary for translators. 2012