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由天津市电子仪器厂与中国市政工程华北设计院合作研制的JSY25型(液化气)JST25型(天然气)两种快速热水器7月4日通过设计定型。该两种热水器的性能及各项指标均达到国家标准,且主要技术指标实
The JSY25 (liquefied gas) JST25 type (natural gas) two kinds of rapid water heaters developed by Tianjin Electronic Instrument Factory and China Municipal Engineering North China Design Institute were designed and finalized on July 4th. The performance and various indicators of the two water heaters meet the national standards, and the main technical indicators