Carry out regular visual checks of vehicles and test equipment 車輛進行定期視力檢查和測試設備
Now landing gear fully extended , three greens on , over the field . please give me a visual check on the landing gear 現(xiàn)在起落架完全放下,三個綠燈亮,飛越機場。請給予我目視檢查起落架。
A visual check of air gaps is sufficient , but mechanical backflow preventers have to be tested with properly calibrated gauge equipment 盡管安裝氣隙足夠目視觀察,但是機械式防回流閥還是必須用適當量程的儀表設備進行檢測。
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 使用者應定期檢視調節(jié)器及輸送喉的操作情況,確保沒有泄漏氣體,亦沒有塵?;蚱渌矬w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 允許視覺檢查燃燒室和火焰。派熱克斯耐熱玻璃,合金網(wǎng)保護,提供大視覺范圍。鑄鐵框架。自動彈簧負載門。