访问教员visiting teacher 飞行教员 instructor pilot-piston; pilot instructor ..
2
?拜访老师
...费者一般很关心产品的价格 ? Consumers in general are very much concerned about product prices 拜访老师 ? Visiting teachers 能在强振动、强电磁、高粉尘环境下稳定工作；对过压、过流、过热、欠压具有自保护功能； ? Can under the strong vibration, th...