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... > "The cost of pipe hinges can be controlled at 30 cents each, and a pair of drawer slides can be controlled at 90 cents."
"Instead, the hydraulic rod used to lift the door will be much more expensive. It is estimated that it will cost one piece and two pieces."
"Of course, as the proficiency of workers increases and the process becomes more mature, the cost can still be reduced."
"The production line is easy to build. Doesn't our subordinate unit have a hardware ...
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