| 摘要 |
A system for forming forgery-proof identification markings on animals involves use of a tool having an impress jaw carrying a plurality of individually removable and rotatably resettable markers linearly arranged along a fixed impressible orientation line element on the jaw. The markers have faces that occupy adjoining spaces along the orientation line and the faces are provided with forming elements in the shape of double bar markings arrangeable perpendicular or parallel to the orientation line and in the shape of right-angle markings having their apices arrangeable at selected distances perpendicularly to the orientation line and their angular legs in selected geometrically patterned relation with such orientation line whereby such markings have a unique and unalterable meaning which is translatable into digits of the Arabic decimal positional system.
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