Bureau of Labor Statistics. Overview: The Bureau of Labor Statistics (BLS) is one of eight specialized divisions within the Department of Labor, and a direct descendent of the original Bureau of Labor, Department of the Interior, established in 1884. (Todayâs Department of Labor was established as a cabinet-level agency in 1913).
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Air temperature. The air temperature in an air blast freezer should be low enough to freeze the fish as quickly as the code of practice recommends; see Advisory Note 27 for details of what quick freezing means and what is necessary to comply with the code. blast freezer is designed to freeze two tons an hour of a product that takes four hours to freeze. Therefore the freezer must have room for eight tons of that product at a time to maintain the designed output, and the cooler and refrigeration machinery will be designed to cope with two tons an hour.