All emergency ladder safety chains shall be up at all times except when person is entering or leaving ladder.
所有紧急梯安全链要随时挂上，除人员正在进入或离开梯子时。
Equipment platform ladder safety chains shall be and will be hooked only when someone is working on the platform.
设备平台梯上的安全链只有有人在平台上工作时应挂好。
Equipment platform ladder safety chains shall be and will be hooked only when someone is working on the platform.
设备平台梯上的安全链只有有人在平台上工作时应挂好。
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