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74HC221N65274HC221RM1374HC237D65274HC237D653
74HC221P74HC221N74HC225D74HC237D
74HC237N65274HC238D65274HC238D65374HC238N652
74HC238A74HC237N74HC238D74HC238E
SN74HC224NSN74HC221DSN74HC237MSN74HC237N
贴片系列74HC595
SN74HC237N74HC237DIP16
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