battle of britain museum folkestone

What rockhound just isn't acquainted with the red and yellow flowers, orbs, and poppies within this highly preferred cutting material? We have all 'ooohed and aaahed' viewing the slabs and cabs at gem shows. With each cut exposing a succession of unexpected patterns I have often been surprised at my finished gems, (though I would always say, "Yep, that is the look I was opting for.") The EGR system routes a number of the exhaust gases (6 ? 10%) from the EGR valve, last on the Intake System, and ultimately within the combustion chamber. The exhaust gases are inert i.e. they cannot burn in the combustion chamber; also, the exhaust gases take up a number of the space which would preferably be taken with the intake air. This reduces the volume of intake air readily available for the combustion process during each Power Stroke; which in turn decreases the peak combustion temperatures. This brings about lower NOx emissions.