As to the case of tunnel crossing, railway bridge and highway bridge, the similar situation exists.
过街的地下通道、铁路桥、公路桥也存在类似的情况。
2
Directional drilling crossing on Raoyang rive and Dongguo pound of Pan-Jin oil transporting pipeline successed the first time based on the above theory and the situation on the worksite.
Methods the sampling sites were choosed according to pollutants drained along the Luan River-diverted channel, the situation of crossing with other rivers and the distribution of water brakes.