h-holdIMDB³³⁹⁷⁹ 例句 The circuit of separating H-hold and V- hold signal with digitizing in TV is designed with edge D flip- flop and partial elements. Its operating principle and advantage are introduced in the paper. 利用 D触发器及部分元件设计出一种能够分离电视行、场同步信号的电路，并介绍其工作原理及优点。 cnki