concentration of polluted air, and how long that bad air remains in the city. unintentional urban microclimates several factors go into creating unhealthy urban microclimates. human-generated heat is a big part of it and much of that is caused by things like internal combustion car engines that use fossil fuels...
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these vibrating machines. channel conveyor with double unbalance gear units different sizes of double unbalance gear units enable outstanding setting-up for your specific application. the balance masses and speeds can be adjusted in stages, enabling the vibration amplitude and acceleration of the machine...
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blended with lighter petroleum fractions or burned directly in specialized boilers and furnaces. it is also used as a petrochemical feedstock. standards and classifications the first standard for fuel oil came in . the latest standard is iso from . the iso standards describe four qualities of distillate fuels...
blended with lighter petroleum fractions or burned directly in specialized boilers and furnaces. it is also used as a petrochemical feedstock. standards and classifications the first standard for fuel oil came in . the latest standard is iso from . the iso standards describe four qualities of distillate fuels...