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贴片直插SN74LS161AML2，SN74LS157MR1G，SN74LS161ADR2，4
贴片直插SN74LS161AML1，SN74LS157ML2G，SN74LS161AMEL，4
SN74LS161AML【LOG TTL BIN CTRS 4BIT】
