求翻译：越铁路、重要公路、交通繁忙要道以及造价高，不宜搬移、拆除的地面障碍物，不能采用破土挖沟时，采用顶管预埋方式防护。是什么意思？

More railways and important highways, heavy traffic arteries, and high cost, not moving, removal of ground obstructions, not ground-breaking trenching, pipe jacking embedded way protection.

The more important roads, railways, roads and heavy traffic, it would not be appropriate fabrication cost is high, move the ground obstructions removed, not a ground breaking digging a trench, with pre-buried way top tube protection.

The railroad, the important road, the transportation busy important highway as well as the construction cost are high, not the suitable removal, the demolition ground obstacle, cannot use when breaks ground the trenching, uses the top pipe in advance to bury the way protection.

Vietnam railways, important roads, heavy traffic arteries and high cost, not moving, removal of obstructions on the ground, can not be used when ground trenching, pipe jacking embedded protection.