视频中，一个人正在使用扳手拧紧或松开一个管道上的螺母。背景是一个混凝土结构的内部，可能是地下室或工业设施的一部分。这个人穿着短袖衣服，戴着口罩和眼镜，专注于手中的工作。他用右手握住扳手，左手辅助固定螺母，动作熟练而专注。
The video shows a person using a ratchet wrench to tighten or loosen a bolt on a concrete wall. The person's hands are visible, and they are holding the wrench with both hands, applying force to turn the bolt. The setting appears to be an industrial or construction environment, as indicated by the concrete wall and metal framework in the background. The person is wearing a mask and safety glasses, suggesting adherence to safety protocols. The camera angle is from above, providing a clear view of the action.
A person is seen using a ratchet wrench to unscrew a bolt from a concrete ceiling, with a rusty metal column visible in the background. After removing the bolt, the person uses their hand to take the bolt out of the socket. The person then uses the ratchet wrench to further loosen the socket. Finally, the person reaches into the socket to retrieve the bolt and moves away, leaving the socket empty.