Rubber policeman

A rubber policeman is a hand-held flexible natural-rubber scraper attached to a glass rod used in chemical laboratories to transfer residues of precipitate or solid on glass surfaces when performing gravimetric analysis. Rubber policemen also come in one-piece flexible plastic versions. They are not the same as rubber scrapers.

单词	Rubber policeman
释义	Rubber policeman 英语百科 Rubber policeman A rubber policeman is a hand-held flexible natural-rubber scraper attached to a glass rod used in chemical laboratories to transfer residues of precipitate or solid on glass surfaces when performing gravimetric analysis. Rubber policemen also come in one-piece flexible plastic versions. They are not the same as rubber scrapers.
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