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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When specified in Purchaser's requisition, vendor shall design platforms & ladders and lugs for them in accordance with Purchaser's platform & ladder arrangement drawings.

如果买方有要求，卖方应根据买方平台及梯子布置图设计平台、梯子及凸耳。

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One engine was called initially, but crews requested an aerial ladder platform, which requires a support vehicle, it added.

BBC: Three crews sent to trapped gull in Norwich

The rescue took about 15 minutes once the aerial ladder platform arrived, and was over by about 15:45 GMT.

BBC: Three crews sent to trapped gull in Norwich

The city's aerial ladder platform would also be crewed on an on-call basis.

BBC: Devon and Somerset Fire Service facing ?5m budget cuts