可能会提供其他的钻井服务，如维修或拆除现有水井结构，电梯井钻井和水力极钻井。
May provide other drilling services, such as repair or dismantling of existing water well structure, elevator shaft drilling and hydro pole drilling.
在结构中部的一侧设有电梯井。
On one side, in the centre of the structure, are erected the lift shafts.
在结构中部的一侧设有电梯井。
On one side, in the centre of the structure, are erected the lift shafts.
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