- The duration of the fixed term. The contractor is required to find a random wall extract riser pipe, which is not specified in the plan of the apartment that position.
-Use a long editing period because contractors need to do random vertical Riser pipe for wall extraction, which is not specified in the plan of the city where the series is.
- the duration of the correction must be made for longer because contractors juice wall to find a random pipeline Riser which does not have to specify a floor plan of the room that is the position?