The phrase "at previous levels" is correct and usable in written English.
It can be used when referring to standards, measurements, or conditions that were established or observed in the past.
Example: "The company's production output has returned to at previous levels after the recent improvements."
Alternatives: "at earlier levels" or "at prior levels".
To keep their income at previous levels, doctors voluntarily shortened visits.
Recent surveys conducted by various industry groups show that business fliers as well as leisure travelers express several reasons for their reluctance to resume traveling at previous levels.
Most others have either reduced their allocations to equities and raised cash holdings, or left both at previous levels.
Funding for the National Gallery, the National Portrait Gallery, the National Museum, the National Library, the National Film and Sound Archive and the National Maritime Museum will remain roughly at previous levels.
"From today all applicants will be charged fees at previous levels and we will reimburse, in all cases where the new fees have been paid, the difference between that fee and the previous fee".
Overall, 33% of ticket prices have been reduced across the Premier League in 2016‑17 – the first season of a record £5.3bn TV deal – with 53% frozen at previous levels.
At lower temperatures, the sheet resistances remain at the previous levels whereas at 100 and 130 °C, the performance is stabilized approximately to 200 kΩ/□ that is significantly lower compared to the PEDOT PSS reference (550 kΩ/□).
The underlying assumption was that central selling would generate at least enough money to maintain the Barcelona and Real Madrid at their previous levels while at the same time generating more money for the other 18 La Liga teams.
At the previous levels, there is no conflict at the required story type and numerical expression.
Patten said: "Today's crisis summit must be clear on its first and most urgent priority, increasing search and rescue back to at least previous levels.
Even with the restriction, trade could resume at near previous levels because about 80percentt of United States beef comes from cows slaughtered before they reach 20 months of age.
