The installation of the exhibits may require mechanical and electrical work, and loading and unloading equipment may call for an additional work force.

布展可能需要机械和电力劳动，而装卸设备可能求额外的劳力。

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All electrical equipment and equipment installation, maintenance, etc. must be electrical permit to operate, and can not live line work.

所有电气设备及器材的安装、维修等必须由持证电工操作，并不得带电作业。

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To undertake the electrical installation and demolition work.

承接电气安装及拆卸工程。

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