A volume of material, including at least some excess material, is placed over the surface, and the excess material is swept off by placing the excess material in {HEAD ~ the predetermined path} of a sweeping member, the path being substantially in {TAIL ~ a plane} spaced from a working surface of material 
A volume of material , including at least some excess material , is placed over the surface , and the excess material is swept off by placing the excess material in { HEAD ~ the predetermined path } of a sweeping member , the path being substantially in { TAIL ~ a plane } spaced from a working surface of material
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