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 the predetermined path of a sweeping member, the path being substantially in {HEAD ~ a plane} spaced from {TAIL ~ 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 the predetermined path of a sweeping member , the path being substantially in { HEAD ~ a plane } spaced from { TAIL ~ a working surface } of material
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