Symptoms: Will not load system menu.
症状：无法加载系统菜单。
Symptoms: Will not load system menu. Maintenance mode fails.
症状：无法加载系统菜单。维护模式失败。
The application of variable structure control to the actuator load system was studied.
研究了舵机加载系统的变结构控制问题。
The application of variable structure control to the actuator load system was studied.
研究了舵机加载系统的变结构控制问题。
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