... donut 环形（室 door breaker 重铁铤 door closer 闭门器 ...
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The interlock device is mounted on the circuit breaker to prevent the cubicle door from being opened when the circuit breaker is in the connected position.
联锁机构安装在断路器上，避免断路器在“接通” 位置上柜体小室门打开。
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