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贴片直插SN74LS161ADG SN74LS156ML1 SN74LS157ML1 4
贴片直插SN74LS157MELG，SN74LS153ML2G，SN74LS156ML1G，4
贴片直插SN74LS156DR2G，SN74LS153ML1G，SN74LS153MR1G，4
