继电控制式激光制导系统的简单性使它具有高可靠性、低成本等优点。
The simplicity of laser guidance systems which operate on Bang-Bang control pattern makes them have high reliability and low cost.
QB可以进行远程控制，同时一个内置的激光制导系统确保它不会撞上家具或者门框。
QB is controlled remotely, but an in-built laser guidance system ensures it does not bump into the furniture or door frames.
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