19-May
The ratchet principle is used on screwdrivers, which is 6 times faster than normal and saves 80% of the effort. It changes the usage of traditional screwdrivers.
Many people have been "dismantling and repairing control" since they were young. When I was young, the toys I bought no matter what they were three or seventy-one were to be dismantled first. When I grew up, my home and small electrical appliances would inevitably need to be repaired.If yo
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