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DEVICE FOR DETERMINING THE POSITION OF AN OBJECT AGAINST ON ONE BY TWO STRAIGHT end marks DEFINED WITH REGARD, IN PARTICULAR FOR DETERMINING THE POSITION OF A BOAT TO START LINE IN SAILING REGATTA
DEVICE FOR DETERMINING THE POSITION OF AN OBJECT AGAINST ON ONE BY TWO STRAIGHT end marks DEFINED WITH REGARD, IN PARTICULAR FOR DETERMINING THE POSITION OF A BOAT TO START LINE IN SAILING REGATTA