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