This series of watches with slender case in 1930 on behalf of the funds, while close to the pulse of trends, giving a unique style to the classic style.
此系列腕表配备1930年代表款的修长表壳，同时紧贴潮流脉搏，为经典造型赋予独特风格。
LFM signal is a classic pulse compression signal and it is one of the ultra-wideband radar waveforms, there is sophisticated theoretical basis of its generating, receiving and processing.
线性调频信号作为一种典型的脉压信号，同时也是超宽带雷达调制波形中的一种，其产生和接收处理已具备了较为成熟的理论研究。
The pulse Doppler (PD) radar is a kind of classic radar which has been furnished in the modern fighters.
脉冲多普勒雷达是现代战斗机普遍采用的一种典型雷达体制。
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