visual checking是什么意思_visual checking中文

visual checking中文什么意思

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Carry out regular visual checks of vehicles and test equipment
车辆进行定期视力检查和测试设备
Now landing gear fully extended , three greens on , over the field . please give me a visual check on the landing gear
现在起落架完全放下，三个绿灯亮，飞越机场。请给予我目视检查起落架。
A visual check of air gaps is sufficient , but mechanical backflow preventers have to be tested with properly calibrated gauge equipment
尽管安装气隙足够目视观察，但是机械式防回流阀还是必须用适当量程的仪表设备进行检测。
Users should have regular visual check on the condition of the regulator and delivery tubing to ensure no leakage or damage and free from dust or other contaminants
使用者应定期检视调节器及输送喉的操作情况，确保没有泄漏气体，亦没有尘埃或其他物体污染。
They allow visual checking of chambers and flames . pyrex glass , protected with alloy mesh , provides large viewing area . cast iron frame and housing . automatic , spring loaded shutter
允许视觉检查燃烧室和火焰。派热克斯耐热玻璃，合金网保护，提供大视觉范围。铸铁框架。自动弹簧负载门。

visual checking中文什么意思