In the method, ice is pressed under the water along {HEAD ~ an inclined surface} formed by a bar screen or {TAIL ~ a grating} 
formed by
In the method , ice is pressed under the water along { HEAD ~ an inclined surface } formed by a bar screen or { TAIL ~ a grating }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL