Under normal conditions, efficiency not too fast for a building of quality and safety was not compromised, so they can spend several times that of PC pile of equipment to construction.
Under normal circumstances, excessive construction efficiency will not affect the quality and safety of one of the buildings, it is possible to put several times in the PC pile of equipment to arrange the construction.
Under normal circumstances, fast construction efficiency not on a building quality and security constitute the effect, so you can put several times on the PC pile machine equipment to arrange the construction.