The machine has the video camera observing function, the effective rust removing and the welding internal joint coating.

该补口机具有摄像观察功能、高效除锈功能和焊口内涂层补口功能。

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Field joint coating shall be performed only when the surfaces to be coated are clean and dry, and in the absence of airborne contamination that can affect the quality of the joint coating.

只有当将要涂敷的表面清洁，干燥且无空气污染时，才可以进行补口涂敷，这些因素都可能影响补口涂层的质量。

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Field joint coating shall be performed only when the surfaces to be coated are clean and dry, and in the absence of airborne contamination that can affect the quality of the joint coating.

只有当将要涂敷的表面清洁，干燥且无空气污染时，才可以进行补口涂敷，这些因素都可能影响补口涂层的质量。

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