Gutters cleaning

Open trenches and gutters are the most common devices for handling bulk spillage in work areas. If there is much traffic in the area, trenches require covers. If they are to be kept clean, they must be accessible, preferably in aisles and not under heavy equipment where it will be difficult to remove covers and to get into them to clean them. If they are to drain satisfactorily, trenches must... 

There are, however, personal robots such as the Robomower that can mow your lawn (Figures 17-4 and 17-5). These robots respond to a wire perimeter aroimd a yard. They will work their way back and forth across the yard, making several passes. When it is finished mowing, the robot will return to its home base to recharge its battery. There are even robots designed to clean the leaves out of your rain gutters. Clearly, robots are designed to do tasks that most people do not want to do. 

Does a tree overhang your gutters If so, you ll need to be diligent about cleaning the gutters at least once every... 

To date, many kinds of CO2 separation membranes have been reported, including polymeric membranes, composite membranes, and facilitated transport membranes. Further improvements in membrane performance depend on effective CO2 separation materials, and one candidate is ILs. It has been reported that ILs have good CO2 selectivity, suggesting that they may be a possibility for the development of new CO2 separation materials. Since ILs are liquid at room temperature, it is necessary to affix ILs to appropriate support materials. Supported IL membranes have been prepared by impregnation of commercial porous polymer films with 1-n-hexyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([hmim][Tf2N]) and have obtained good C02/He separation properties [40]. Recently, electrospun Nafion/polyethylene oxide (PEO)-supported IL membranes were fabricated for CO2 separation [41]. In this composite membrane, the electrospun Nafion/PEO material acted as a gutter layer for ILs and PEO was added to form clean nanofibrous... 

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