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