Small Dc Gear Motor 
There is a story goes like this: a farmer, he want to put the cow micro gear motor in the bullpen with son. But the cattle class, not into the tent. Thrust, father and son two people take me to the best of all one's skill, the cow is not move. At that moment, the farmer's wife pulled out a handful of grass from the river bank, while feed cows led the cow walking in the bullpen, the...
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