飞机失事两天后，联邦飞航管理中心下令小型固定机翼的飞机不可以飞越东河，除非飞行员先行与航空控制员联络。
Two days after the accident the federal aviation administration ordered small fixed-wing planes not to fly over the east river unless the pilot is in contact with air traffic controllers.
该课程的先行课是电路、模拟电子技术、数字电子技术、自动控制原理、电气测试技术。
Its advance courses are circuit theory, simulated electronic technology, digital electronic technology, and electrical testing technology.
在福州961人防工程乌山主通道工程施工中采用中洞先行的施工方法，地功地控制了地表变形，保证了地表建筑物的正常使用。
Center drift first construction method was adopted in Wushan main tunnel of Fuzhou 961 Civil Air Defence Work, and ground surface deformation was well controlled.
提出了为节约电能，提高除尘效果，混风降温、喷雾降温的自组织微分先行PID控制思想及策略。
The control method of self-organized and differential front PID has the advantages of saving electir energy, the effect of dust collecting, wind mixing and spraying for temperature reducing.
提出了为节约电能，提高除尘效果，混风降温、喷雾降温的自组织微分先行PID控制思想及策略。
The control method of self-organized and differential front PID has the advantages of saving electir energy, the effect of dust collecting, wind mixing and spraying for temperature reducing.
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