锁环，汉语词汇，拼音是suǒ huán，意思是锁链。
专利锁环设计，让珠子自由移动尚未确保他们无法挣脱。
Patented ring-lock design allows beads to move freely yet ensures that they can't break loose.
图1图示说明可以包括本发明技术的相锁环(PLL)的示例。
FIG. 1 illustrates an example of a phase-locked loop (PLL) that can include techniques of the present invention.
另一个预防措施就是安装精制的锁环，使仪表非得用特备的钥匙才能移动。
Another prevention method was through elaborate locking rings which made meters non - removable, except with special keys.
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