丝印MC74LS139N MC74LS138N MC74LS138D MC74LS137D MC74LS132D
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卖SN74HC24N HD74LS151P LM2901N MC74HC139AN原装
卖M51257L-10 TL527N 74LS590N MC74HC4002N139AN原装
原装MC74HC139AN MC14068BCP SN74LS244N TC74HCT04AP
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