In olympics table tennis, why do they keep touching the center of the table?


Question by tsfboy: In olympics table tennis, why do they keep touching the center of the table?
Once in a while, and generally after they lose a loint, they seem to do a little ‘wipe’ motion on the table in front of the net. The table is clean, and they have towels to wipe their hands. Why touch the table? Any idea?

Best answer:

Answer by Marcel C
to wipe of the rice

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    http://en.wikipedia.org/wiki/Periodic_table

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