The machine will link the upper and lower to the upper bearing the weight and work load, and the upper to the lower part of the rotation.
它将机器的上部和下部连接起来，用以支承上部的重量和工作负荷，并使上部能相对于下部旋转。
The machine will link the upper and lower to the upper bearing the weight and work load, and the upper to the lower part of the rotation.
它将机器的上部和下部连接起来，用以支承上部的重量和工作负荷，并使上部能相对于下部旋转。
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