Cleaning device for building roof, has truss made of metal e.g. copper, where upper surface wrapping truss is smaller than air permeable surface of metal truss, which forms reaction surface that reacts with water or moisture

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专利权人:

WEBER, HUGO

发明人:

申请号：

DE20032021144U

公开号：

DE20321144(U1)

申请日:

2003.04.24

申请国别(地区):

德国

年份:

2006

代理人:

摘要：

The device has fastening clamps (3, 4a) for fastening a truss (2) to a building roof. The truss is partly made of a metal e.g. copper, which reacts with water or moisture. An upper surface wrapping the truss is smaller than an air permeable surface of the metal truss. The metal air permeable surface of the truss forms a reaction surface that reacts with water or moisture. The truss extends over the entire length of the roof.

来源网站：

中国工程科技知识中心

来源网址：

http://www.ckcest.cn/home/