Voir la source de Moving-back-as-far-as-the-Roman-times-in-ancient-Rome-Man-has-started-using-stone-to-cover-up-drain-covers-s

Moving back as far as the Roman times, in ancient Rome Man has started using  [http://blog.bizeso.com/BlogDetail.aspx?bid=31f4d947-9587-41d5-9ac1-8eb2a0101782 What is a floor drain?]  to cover drain covers.
<br />The layman term for drain cover (grate) is manhole cover. Say &quot;manhole cover&quot; and pictures of spies/heros making use of the underground sewage system popping out of manhole cover in Hollywood films appear.
<br />Historically since that time Man invented the sewage system since the Roman Times to drain water and urban waste away for sanitation purposes, manhole covers (drain covers or grates as we would prefer to call them) have been invented out of the basic need to avoid people from falling into underground sewage and also prevent large objects from entering the drains which cause choking which eventually could lead to flooding.
<br />Fast forward to the modern day, the sewage system is still being used under all cities around the world. Rather than  [http://blog.bizeso.com/BlogDetail.aspx?bid=31f4d947-9587-41d5-9ac1-8eb2a0101782 What is a floor drain?]  covers the Romans use in the ancient days, nowadays we have special steel reinforced stone gratings that serve the thousand year old function of covering the inlets of our sewage system.
<br />Much more than a cover, check out Jonite's range of drain covers (drain gratings) here: http://www.jonite.  [http://www.anobii.com/groups/01d4a57731c8574657/ What is a floor drain?]  /products/creative-grates