| http://www.w3.org/ns/prov#value | - The present invention can supply a plurality of light beams produced by lasers or other light sources or a plurality of extendable tapes to provide alignment both in the direction of play and perpendicular...http://www.google.es/patents/US8057321?utm_source=gb-gplus-sharePatente US8057321 - Golf alignment device and method B???squeda avanzada de patentes N???mero de publicaci???nUS8057321 B2Tipo d
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