They needed 4 men to push a wooden fence post into the ground. 他们需要四个人来将那个木制的栅栏柱推到地下。
The most important severe hazard risk is the ground contact condition which arises in transmission poles, fence posts and railway sleepers. 危害木材最严重的情况，是在木材与地基接触的条件下发生的，为通讯电杆，栅栏柱材和铁路枕木。
