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... r and process it into a sound insulation disk on the machining center.
Parts were produced under his hands one by one, and he put all the high-temperature sound-proof cotton, sound-proof net, and sound-proof plate in an open space.
After the carbon fiber muffler was solidified, he started to assemble the muffler.
This time, a total of five soundproof rooms were made for the muffler, and many soundproof tiles were made in each soundproof room.
The structure of this muf ...
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