3. check for a bug made it 4. The main transport pipe when the paste and then move the redirect is not 5. Not suitable for transport in the terrain with frequent earthquakes.
3. Check for weak spots difficult 4. When the main pipeline used to transport then moves redirect not five. Not suitable for transportation in terrain with frequent earthquakes.
3. Check for defects, it is difficult to 4.? The main duct transport use when placing and moving path is not 5, change. Not suitable for transport in the terrain with earthquakes frequently.