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PCE
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CPC Subgroup
B08B 9/087

by methods involving the use of tools, e.g. brushes, scrapers ( , B08B9/20 take precedence)

Full Title

Cleaning hollow articles by methods or apparatus specially adapted thereto > Cleaning containers, e.g. tanks > by methods involving the use of tools, e.g. brushes, scrapers ( , B08B9/20 take precedence)