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苏联的一个建筑公司在混凝土冬期施工中,采用了一种柔软的电热被,来覆盖混凝土。电热被的外层是塑料编织物,内面是碳棒电热元件和用儿层玻璃布缝制成的保温
A construction company in the Soviet Union used a soft electric heater to cover concrete during the winter construction of concrete. The outer layer of the electric heating is a plastic braid, the inner surface is a carbon rod electric heating element and the thermal insulation made of a child glass cloth seam