main chain circuit breaker 主电路断路器
The mechanism of low voltage miniature circuit breaker is very complicate, thus its assembly dimension chain and the tolerance of critical dimensions are researched.
由此，对微型断路器机构的装配尺寸链和关键尺寸公差进行了研究。
The rod breaker in YJ19 cigarette maker had complex mechanism and long gearing chain, and its stability and reliability were not satisfactory.
YJ19卷烟机打条器结构复杂，传动路线长，稳定性和可靠性差。
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