Inspection welding seam and dimension of cargo hatch cover.

货舱舱口盖焊缝和尺度检查。

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There is safety switch at the inspection hatch of the hood. If the hatch is opened, the power of motor will automatically cut off to ensure the safety of inspection personnel.

机顶盖检修口设有安全检测开关，形成断电安全装置，当检修口打开时自动切断电机电源，确保检修人员的人身安全。

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