• The plant has been in operation for seven years.
• These valves are still in service .
• By the 1820s much more efficient hydraulic motors were already at work .
• The plant has been in operation for seven years.
• These valves are still in service .
• By the 1820s much more efficient hydraulic motors were already at work .
Циммерман М., Веденеева К.. Русско-Английский научно-технический словарь переводчика. Russian-English scientific dictionary for translators. 2012