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