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千斤顶的施力点应选择被顶起物体柔韧的部位。

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Describe the important contributions made by the classical theorists.

钢丝绳夹与钢丝绳套环配合，作夹紧钢丝绳末端用。

What did the early advocates of OB contribute to our understanding of management？

Describe total quality management.