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.
Michael告诉他哥哥，他找到了通往医务室大楼的路径，但他需要想个办法出来，能够不用梯子就爬上20英尺高的垂直排水管。
The software is combining ladder diagrams and sequence fuction chart (SFC) for realizing automatic control of pipe bender to enhance machining efficiency.
软件由梯形图和SFC图相结合，实现对弯管过程的自动控制，提高了加工效率。
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;
进风立井装备梯子间、排水管、压风管、消防洒水管以及动力电缆等，为进风井兼安全出口；
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