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Four-wheel-how to prevent Speed

939,511,0692010-01-25 13:01:21 +0000 #1
using only original parts: plastic idler pulley, bilateral motor, plastic tires, batteries 2500 milliamperes. Want to master pointing. Please do not give in I'm not original parts assembling method. Urgent need for the morning of November 21, please hurry up pointing expert. Thanks! Additional points should be.
sx9702010-01-25 13:03:38 +0000 #2
battery performance is too high, the wheels do not slip, idler pulley is not durable, incumbent,, incumbent,.
Caibao cb2010-01-25 13:45:39 +0000 #3
Leading wheel pretending to double the general problem solved

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