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For instance, a bill of quantities is a list of all the materials (and other work such as amount of excavation) of a project which have sufficient detail to obtain a realistic cost, or rate per described item of work/material. The tenders should not only show the unit cost per material/work, but should also if possible, break it down to labour ...
A material recycling or media reclamation system to collect abrasive blasting media so it can be used again; these can be automated mechanical or pneumatic systems installed in the floor of the blast room, or the blast media can be collected manually by sweeping or shoveling the material back into the blast pot
Karen Thomas, John Laplante, Alan Buckley: Guidebook of part cleaning alternatives : making cleaning greener in Massachusetts. 1997, Toxics Use Reduction Institute, University of Massachusetts, Lowell, Massachusetts, USA; ASM International: Choosing a cleaning process. 1996, ASM International, Materials Park, Ohio, USA. ISBN 0-87170-572-9
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Moreover, because the acidic or basic drain cleaners themselves are washed down the drain, this contributes to pollution in the water supply. Drain cleaners usually contain a strong base such as sodium hydroxide that decomposes hair and converts fats into water-soluble products. The reaction is exothermic, releasing heat to soften the fats.
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Cleaning agents or hard-surface cleaners are substances (usually liquids, powders, sprays, or granules) used to remove dirt, including dust, stains, foul odors, and clutter on surfaces. [1] Purposes of cleaning agents include health , beauty, removing offensive odors, and avoiding the spread of dirt and contaminants to oneself and others.