道路供热

• 作者: 平原
• 来源期刊: 语言教育
• 学科: 医学
• 关键词: winter BENEATH fabric ASPHALT CALLS BRIDGES capillary immediately METRE MARKS
• 年，卷（期）: 1987,（3）
• 页码范围: 50-
• 页数: 1页
• 分类号: R73

摘要

<正> There is an alternative to salting or gritting roads in winter. The firm of Herbst has developed what it calls capillary tube matting which keeps road junctions and bridges free of snow and ice. A fabric consisting of long, thin tubes is laid beneath the road surface at two levels: one immediately under the asphalt, the other at a greater depth. The earth’s