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The vending machine is the commercial automation equipment which can complete the vending without people. It is a production of social transformation from the labor-intensive to technology-intensive industry structure. This topic using Mitsubishi PLC FX2N - 32 MR controlled the vending machine control system, improved the stability of the vending machine system, make sure the vending machine can long-term and stable operation.
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Yang et al. (2014) studied this question.
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