Michael tells his brother that he found their access to the infirmary building, but he'll need extra time to find out how they'll get up a twenty foot vertical drain pipe without a ladder.

The software is combining ladder diagrams and sequence fuction chart (SFC) for realizing automatic control of pipe bender to enhance machining efficiency.

Equipped with a ladder into the air shaft, the drainage pipes, duct pressure, fire sprinkler pipe and power cables for safety into the ventilation shaft and exports;