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。
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。
To undertake the electrical installation and demolition work.
承接电气安装及拆卸工程。
To undertake the electrical installation and demolition work.
承接电气安装及拆卸工程。
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