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贴片直插SN74LS193MELG，SN74LS175MR1G，SN74LS193DR2G，4
贴片直插SN74LS194ADG，SN74LS175MR2，SN74LS193DR2，4
贴片直插SN74LS193ML1，SN74LS175DR2，SN74LS175MR1，4
