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贴片直插SN74LS175ML1,SN74LS174ML2,SN74LS175MEL,4
原装MC74HC174AFEL UPD74HC157 UPD74HC175GS-T2 SN74LS158MEL
贴片直插SN74LS194ANG,SN74LS175ML2,SN74LS193MEL,4