对双电机实现自同步直线激振的进一步分析和推导，给出自同步原理和同步性条件；
The paper further analyses the mechanism of double motor linear excitation. This chapter establishes the principle of the realization of auto-synchronization and the condition of auto-synchronization.
采用振动助流技术和双电机自同步激振理论的全新设计理念，研制了YZZ型振动助流器。
Thenew design idea was used which the vibration flow-aiding technology and the theory of double motors and self-synchronizing vibration, optimized and studied the YZZ vibration flow-aiding machine.
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