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spec: Better control of diffusion in a combustion chamber results in less unburned fuel and fewer undesirable byproducts . I mean , this is the director of Homeland Security . Emphasis on aeronautical themes is usually preferred . Printed on first three leaves only . Otherwise stated , those inventions relating to the excavating art , including power scoops , shovels or the like in which movement is imparted to such scoops or shovels subsequent to or in addition to those movements deemed necessary to complete an excavating operation , which additional movement is usually for transporting the excavated material to a disposal point , are considered to include such handling of the excavated material as will provide a basis for classification in this class ( 414 ) . The injector is usually constructed of plastic , which makes it resistant to most chemicals . However , allowing one government appointee to decide whether or not employees will be allowed to vote is simply not democratic . My company has studied the relationship between technology 's complexity and consumers ' attitudes and found that two out of three Americans have lost interest in a technology product because it seemed too complex to set up or operate . The reaction occurs rapidly and often dramatically , and is usually unanticipated . In 1889 , a clock was produced which had one pendulum swinging as freely as possible and another to control the clock mechanism . Everyone is a winner today , especially the residents of Maryland and the District . The aldolization can be catalyzed by acids or bases , but base catalysis is usually preferred .