| 摘要 |
Disclosed is a method for producing an ice surface for an ice rink by fre ezing water to which an inorganic substance is added. The inventive method i s characterized in that the inorganic substance is ammonia, an alkali hydrox ide or alkaline earth hydroxide, a hydrogen halide, nitric acid, sulfuric ac id, phosphoric acid, an alkali salt, alkaline earth salt, or ammonium salt o f said acids, ammonium hydrogen carbonate, or a mixture of several of said s ubstances.
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