In terms of the management arrangements operated plumbing piping erosion, under construction has been damaged digestive plumbing, making it difficult to view as neglect.
Ready-powered plumbing pipe corrosion in the operational management side, it is difficult to determine even the digestive pipe damage during construction being left intact.
Work ready for expression plumbing pipes in terms of the operating management erosion, construction pipes damaged digestive organs even if it is difficult to determine, and leave it unchecked.