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正品D74HC4024C D74HC4020C D74HC2002C D74HC123AC D74ALS03BN
D74HC4020C DIP16全新进口现货14级二进制纹波计数器 质优价廉
D74HC4020C DIP16全新现货14级二进制纹波计数器 质优价廉
适用卡邻 SN74HC253D SN74HC174DR SN74HC4020D SOP16赞