The installation of the exhibits may require mechanical and electrical work, andloadingandunloadingequipment 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。
2
DY type portable belt conveyor is a kind of high efficiency, the use of safe and reliable, flexibility good continuous transportation loadingandunloadingequipment.
DY型可移动式皮带输送机是一种工效高，使用安全可靠，机动性好的连续输送装卸设备。
3
Ports, docks, loadingandunloading spots and shipyards must draw up oil spill pollution contingency scheme and shall be equipped with corresponding contingency equipment and devices.