steel wool

noun
🔊/ˌstiːl ˈwʊl/
🔊/ˌstiːl ˈwʊl/
(British English also wire wool)
[uncountable]
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  1. a mass of fine steel threads that you use for cleaning pots and pans, making surfaces smooth, etc.钢丝球(用以擦洗或磨光)
    Oxford Collocations DictionarySteel wool is used before these nouns:
    • pad
    See full entry