What are the developments (eg. rule changes, changes with new technology) in the sport curling?
by 
liza-z
ANSWERS: 1
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A major development has been the introduction of an automatic system for sensing hog line violations. A metal rod is placed under the ice in a specific area at each hog line. If the player does not release the stone by the hog line, a red light is turned on on the handle of the stone.
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