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74HC193N 74HC4017D 74HC4020M1R 74HCT245M1R原装
74HC03AN 74HC193N 74HC4017D 74HC4020M1R
丝印M74HC4028B1R M74HC4024MIR M74HC4024B1R M74HC4020M1R
丝印M74HC4020B1R M74HC4017M1R M74HC4017B1R M74HC4016M1R
贴插M74HC4020B1R M74HC4060B1R M74HC4066M1R N