作者: James M. Havard , Ronald E. Bayless
DOI:
关键词:
摘要: Individual electrically heated mats, self-regulated by use of an electrical element whose resistance varies proportionately with its temperature, used for covering walking areas to prevent accumulation snow and ice. Each mat is provided male female connections on the ends short power cords permit any number mats be chained together in parallel cover, example, a flight stairs positioning one each stair.