Drill pipes are tools to transfer power and transport mud.

石油钻杆是用于传递动力、输送泥浆的主要工具。

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Then they put the knife down, transfer the fork to their right hand, and only then do they transport the food to their mouth.

然后他们把刀放下，把叉转到右手，只有这时他们才把食物送入口中。

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Then they put the knife down, transfer the fork to their right hand, and only then do they transport the food to their mouth.

然后他们把刀放下，把叉转到右手，只有这时他们才把食物送入口中。

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