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Sunglasses allow better vision in bright daylight, and may protect one's eyes against damage from high levels of ultraviolet light. Typical sunglasses are darkened for protection against bright light or glare; some specialized glasses are clear in dark or indoor conditions, but turn into sunglasses when in bright light. Most sunglasses do not have corrective power in the lenses; however, special prescription sunglasses can be ordered. Specialized glasses may be used for viewing specific visual information (such as stereoscopy) or 3D glasses for viewing three-dimensional movies. Sometimes glasses with no corrective power in the lenses are worn simply for aesthetic or fashion purposes. Even with glasses used for vision correction, a wide range of designs are available for fashion purposes, using plastic, wire, and other materials. Steam brought plenty of changes for the Victorian era, as steam-powered machines were everywhere. Steam was at nearly every section of their lives. They now had factories with machines that could replace people. Some of those people became professionals, and also the office worker arrived to prominence. Goods may be produced on a massive scale, also remember they now had steam engines which could transport goods extensively. It was a time of telecommunication on their behalf, and traveling which could be done via steam-engine trains and ships. It was a time of changes, indeed. Mausoleum smells are from the decomposition process, which occurs naturally as the body undergoes the decaying process. Morticians frequently call the offending bodies, "leakers". These mausoleum odors may be terribly overwhelming, and thus of the embalming chemicals as well as the gases coming because of decomposition, they're able to in conjunction with that pose a health hazard to workers and visitors. Air filter is blocked so there's not enough air input. There is a problem with motorcycle sprocket, like idling air inlet congestion, then the air input just isn't enough. The oil amount of float chamber is too high, some gasoline go directly into the cylinder without atomization, that may cause incomplete combustion. Main orifice wearout seriously and then this fuel injection from primary nozzle increases, that may cause incomplete combustion. Heating automatic valve is at start position along with the enrich valve can't be closed automatically, that can caused a wealthy mixture. Carbon deposit in muffler, exhaust jam, waste gas stay in cylinder, that can caused incomplete combustion then black smoke.