[计] three-layer construction logic circuit
sān céng jié gòu luó ji diàn lù ㄙㄢ ㄘㄥˊ ㄐㄧㄝˊ ㄍㄡˋ ㄌㄨㄛˊ ㄐㄧ˙ ㄉㄧㄢˋ ㄌㄨˋ