FIVE in Visual C#

Decoder Code 128B in Visual C# FIVE

CHAPTER FIVE
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Code 128C Reader In C#.NET
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The latter results when flammable gases (such as methane) trapped in the coal are released during mining operations and accidentally are ignited Provision of adequate ventilation is, amongst other aspects an essential safety feature of underground coal mining In some mines, the average weight of air passing daily through the coal mines may be many times the total daily weight of coal produced Not all of this air is required to enable miners to work in comfort Most of it is required to dilute the harmful gases, frequently termed damps (German dampf, vapor), produced during mining operations The gas, which occurs naturally in the coal seams, is methane (CH4, firedamp) that is a highly flammable gas and forms explosive mixtures with air (5 14 volume percent methane) The explosion can then cause the combustion of the ensuing coal dust thereby increasing the extent of the hazard In order to render the gas harmless, it is necessary to circulate large volumes of air to maintain the proportion of methane below the critical levels Long boreholes may be drilled in the strata ahead of the working face and the methane drawn out of the workings and piped to the surface (methane drainage) Carbon monoxide (CO, whitedamp) is a particularly harmful gas; as little as 1 percent in the air inhaled can cause death It is often found after explosions and occurs in the gases evolved by explosives Carbon dioxide (CO2, blackdamp, chokedamp, or stythe) is found chiefly in old workings or badly ventilated headings Hydrogen sulfide (H2S, stinkdamp) is one of the first gases to be produced when coal is heated out of contact with air It occasionally occurs in small quantities along with the methane given off by outbursts and is sometimes present in the fumes resulting from blasting Afterdamp is the term applied to the mixture of gases found in a mine after an explosion or fire The actual composition varies with the nature and amount of the materials consumed by the fire or with the extent to which firedamp or coal was involved in the explosion The continued inhalation of certain dusts is detrimental to health and may lead to reticulation of the lungs and eventually to fatal disease pneumoconiosis or anthracosis (black lung disease) Coal and silica dusts are particularly harmful and the methods that have been adopted to combat the dust hazard include the infusion of water under pressure into the coal before it is broken down; the spraying of water at all points where dust is likely to be formed; the installation of dust extraction units at strategic points; and the wearing of masks by miners operating drilling, cutting, and loading machinery The environmental aspects of coal mining are varied and range from aquifer disturbance in the subsurface to floral and faunal disturbance on the surface In addition, the transportation of spoil or tipple to the surface from an underground mine where it is then deposited in piles or rows offers a new environment hazard Toxic minerals and substances exposed during removal of the overburden include acidic materials, highly alkaline materials, and dilute concentrations of heavy metals These materials can have an adverse effect on the indigenous wildlife by creating a hostile environment (often through poisoning the waterways and, in some cases, destruction of species Thus, mine design should include plans to accommodate potentially harmful substances, which are generated by weathering of spoil piles Surface areas exposed during mining, as well as coal and rock waste (which were often dumped indiscriminately), weathered rapidly, producing abundant sediment and soluble chemical products such as sulfuric acid and iron sulfates Nearby streams became clogged with sediment, iron oxides stained rocks, and acid mine drainage caused marked reductions in the numbers of plants and animals living in the vicinity Potentially toxic elements, leached from the exposed coal and adjacent rocks, were released into the environment Since the 1970s, however, stricter environment laws have significantly reduced the environment damage caused by coal mining Once the coal has been extracted it needs to be moved from the mine to the power plant or other place of use
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Bar Code Recognizer In Visual C#.NET
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Decode Code 128 Code Set A In Visual C#
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Code 128A Reader In .NET Framework
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Code128 Decoder In .NET
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Recognize ANSI/AIM Code 128 In VB.NET
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Bar Code Scanner In C#
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Reading UCC-128 In Visual C#
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Barcode Decoder In Visual C#.NET
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USS Code 128 Reader In C#
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Read Postnet In Visual C#
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Recognize Code 128 In None
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GTIN - 12 Recognizer In C#.NET
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Recognize Bar Code In None
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Read Quick Response Code In C#.NET
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Read Linear 1D Barcode In .NET
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Decode PDF417 In Java
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Recognize Data Matrix In .NET
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