| 摘要 |
A removing agent comprising a composition containing at least a hydroxycarboxylic acid and a sulfamic acid, said agent being adapted for use in removing calcium compounds, magnesium compounds and organic substances deposited on the dentures, or those on the inner surface of drainpipes for dental units and toilets, drainpipes in operating rooms and supply rooms of hospitals, and drainpipes in transportation means such as trains, vessels and aircraft, and also for use in removing filthy adhesives in various apparatus in the field of chemical industry associated with calcium, power generator equipment, heat exchangers, etc.
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