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