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贴片直插SN74LS393ML2 SN74LS38MR2G SN74LS393ML1 4
贴片直插SN74LS42ML2/SN74LS393NG/SN74LS38MR2/SN74LS393MG/4
贴片直插SN74LS541NG/SN74LS42ML1/SN74LS38ML2/SN74LS393DG/4
