{TAIL ~ A device} 1, in which the element permeable to the coolant is {HEAD ~ a grate} 
{ TAIL ~ A device } 1 , in which the element permeable to the coolant is { HEAD ~ a grate }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD