By reutilizing and welding discarded tubes and saddles the old bike parts can be re-incorporated into the public realm as a simple useful urban furniture piece.
In addition, polymer microporous filter media can be easily carried out planing, sawing, turning, welding and other re-processing, and the installation and maintenance is more easy and convenient.
另外，高分子微孔过滤介质可以很容易进行刨、锯、车、焊等再加工，安装与维修较轻松方便。
3
During welding metallurgic process, re compound with surface energy separated out previously from superheating melted metal, and acted as the crystallizing nucleus of compound carbides.