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Its company colors and unique emblem have become a well known sight on the railroads in South Africa from Cape Town to Tanzania's Dar es Salaam. Anyone wishing to experience a modern day African safari in ultra style and comfort may wish to book a compartment. The train leaves from its private station near Pretoria, South Africa to major cities within its borders and further afield to countries such as Namibia, Botswana, Zambia and Zimbabwe. Still, there's such way of psychotherapy like a music therapy, based mainly on the end results of music of Mozart. For a long time whatever the researches linked to the treatment of tinnitus, scholars study the Mozart's music of being a healing factor for the treatment of various psychosomatic disorders. The EGR system routes a number of the exhaust gases (6 ? 10%) through the EGR valve, back in for the Intake System, and finally inside combustion chamber. The exhaust gases are inert i.e. they do not burn inside the combustion chamber; also, the exhaust gases occupy a few of the space which may otherwise be taken from the intake air. This cuts down on level of intake air readily available for the combustion process during each Power Stroke; which often decreases the peak combustion temperatures. This ends in lower NOx emissions.