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This tutorial covers how to construct a hank drum, an instrument invented by Dennis Havlena that imitates the extremely expensive and difficult to obtain Hang Drum. This instrument can be built for $27 if one has all the necessary tools. A bargain considering one of these propane tank drums recently sold on ebay for over $10,000. My particular drum also won 1st place at Science Olympiad for the state of Georgia.
22 May 2008
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Vibrant Construction EquipmentsPvt Ltd is a quality provider of asphalt drum mix plant that is designed for the needs of the modern generation contractors & available in the different capacities. asphalt drum plant, drum mix plant, asphalt drum mix plant, asphalt batch mixing plant, asphalt drum mix plant manufacturer, drum mix plant manufacturer in india, hot oil heated bitumen storage tanks, drum mix plant india, asphalt road equipment, asphalt hot mix plant, asphalt batch type mixing plant.
9 Jun 2017
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Nearly every activity leaves behind some kind of waste in the environment. Households create ordinary garbage. Cars, trucks, and buses emit exhaust gases while in operation. Industrial and manufacturing processes create solid and hazardous waste. Some wastes contain chemicals that are hazardous to people and the environment. Once these hazardous chemicals are present in the environment, people can become exposed to them. Exposure occurs when people have contact with a chemical, either directly or through another substance contaminated with a chemical. The place where the chemical originates is called the source. Chemicals can enter the environment from many different sources such as landfills, incinerators, tanks, drums, or factories. Human exposure to hazardous chemicals can occur at the source or the chemical could move to a place where people can come into contact with it. Chemicals can move through air, soil, and water. They can also be on plants or animals, and can get into the air we breathe, the food we eat and the water we drink. The different ways a person can come into contact with hazardous chemicals are called exposure pathways. There are three basic exposure pathways: inhalation, ingestion, and skin contact. Inhalation is breathing or inhaling into the lungs. Ingestion is taking something in by mouth. Skin contact occurs when something comes in direct contact with the skin. Ingestion can be a secondary exposure pathway after skin contact has occurred, if you put your hands in your mouth and transfer the chemical from your hands to your mouth. The Environmental Protection Agency (EPA) has developed informational summaries on selected chemicals to describe how people might be exposed to these chemicals and how exposure to them might affect their health. The summaries also explain what happens to the chemicals in the environment, who regulates them, and whom to contact for additional information.
20 Sep 2017
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