吊链上所标的安全载重量，应用数码或文字记在铁链上或牢系在铁链的质料坚固的牌或环上。

The safe workingload marked on chain slings shall be either in plain figures or lettersupon the chains or upon a tablet or ring of durable material attachedsecurely thereto.

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根据不同道路、载重量情况采取不同操作方法，不安全因素可能降至最小限度。

It is possible to minimize the hazard with different operation methods according to the condition of road and loads.

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为了保证臂架式起重机的安全工作，必须安装能监测载重、幅度等影响起重机力矩因素的力矩保护器。

For the safe operation of jib cranes, load moment limiters need to be installed to monitor and control values of load and radius influencing the value of load moment.

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