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... don't say anything else, just disassemble the machine and replace the worn gears inside, you must know the structure of this machine.
Only then can it be disassembled unscathed, the gears that have been ground inside are completely replaced, and a new one can be installed.
Then, the hardest step comes out, which is...you must also have a certain knowledge to package the machine back intact.
This step can be said to be the most difficult step, because, no matter what, it is m ...
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