由准同步视频检波的特点及其存在的问题引出锁相环（ PLL）完全同步视频检波电路。
The PLL full synchronization video detector circuit is educed by feature and troubles of quasi-synchronization video detector.
隔板、垫圈位于螺栓上，其中钢丝环引出端从环的切线方向引出后被固定于隔板及垫圈上。
When the screw bolt is rotated, the washer is forward pushed out, and thereby, the steel wire ring is tightly connected to realize the purpose of tightening ring.
隔板、垫圈位于螺栓上，其中钢丝环引出端从环的切线方向引出后被固定于隔板及垫圈上。
When the screw bolt is rotated, the washer is forward pushed out, and thereby, the steel wire ring is tightly connected to realize the purpose of tightening ring.
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