CONCAVE-CONVEX ROLLER ASSEMBLY
A dual-ended applicator is provided. The applicator includes a handle, a first roller having a broad concave surface at one end of the handle, and a second, ball-like roller having a convex surface, at the opposite end of the handle. The first roller, having a greater axial length and surface area t...
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Format: | Patent |
Sprache: | eng ; fre |
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