The square wave source is an impulse source in which digital technique is used. It has the advantages of rigid phase, high frequency stabilization and high antijamming.
方波电源是采用数字技术的脉冲电源，具有相位严格、频率稳定度高，抗干扰能力强等独特的优点。
Further topics include kinematics, particle dynamics, motion relative to accelerated reference frames, work and energy, impulse and momentum, systems of particles and rigid body dynamics.
更进一步探讨运动学，质点动力学，于加速座标系上之运动行为，功，能量，冲量，动量和质点系统与刚体动力学。
When pushed to the rigid board, the impulse member is engaged to the installation element. Thus, flexible PCB is connected to the rigid board mechanically and electrically.
当推动元件被推向刚性板而导致推动元件与安装元件啮合时，柔性印刷电路板与刚性板连接而电连接柔性板和刚性板。
When pushed to the rigid board, the impulse member is engaged to the installation element. Thus, flexible PCB is connected to the rigid board mechanically and electrically.
当推动元件被推向刚性板而导致推动元件与安装元件啮合时，柔性印刷电路板与刚性板连接而电连接柔性板和刚性板。
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