【摘要】 市政工程中井盖的经常被盗已成为一种社会公害,因此研究和开发具有防盗功能的井盖就引起了社会各界越来越多的关注。本文介绍了近年来研究开发并得到广泛应用的非铸铁检查井盖,并对其各自的优、缺点作了一些分析和比较。更多还原

【Abstract】 s: The manhole cover made of cast iron in municipal engineering is often stolen,so many manhole covers guarding against theft are developed. This article introduces some manhole covers made of non-cast-iron applied in municipal engineering , and analyzes their advantage and defect.更多还原