用吊件将吊杆与主龙骨连接固定，并使主龙骨保持水平；

Use the hook fitting to link and fix the boom and key keel, keep the key keel horizontal;

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他说，尽管抱着这样一个脆弱的小孩是一件提心吊胆的事情，但是新的发现表明这么做确实很有用。

Although it's a scary thing to hold a tiny vulnerable baby, he said, the new findings show it does help.

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根据分析结果，确定了该起重机的关键元(部)件和薄弱环节，提出了降低吊物坠落概率的简便有效措施。

According to the results, the key parts and weak links of the crane are determined, and some effective measures for reducing the load falling probability are proposed.

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