Because of the temporary nature of site work and the frequent change of the work place, it is not possible to mechanize material handling to the same extent as it would be in a more stable operation.

• 由于现场工作的暂时性和工作场所的经常变化，不太可能使物料处理机械化从而达到相同的程度，因为这将需要一个更稳定的操作。