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sulphuring▼◼◼◼noun[UK: ˈsʌlfərɪŋ ] [US: ˈsʌlfərɪŋ ]
sulphuration▼noun[UK: sˌʌlfjərˈeɪʃən] [US: sˌʌlfjɚrˈeɪʃən]
sulphurization▼noun[UK: sˌʌlfjʊraɪzˈeɪʃən] [US: sˌʌlfjʊrᵻzˈeɪʃən]
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