SN74LS192
SN74LS192N
SN74LS193
SN74LS193D
SN74LS193DE4
SN74LS193DG4
SN74LS193DR
SN74LS193DR2
SN74LS193DRE4
SN74LS193DRG4
19129493934(手机优先微信同号)0755-83266697