海绵宝宝和派大星听说了“总排水管”的故事，二人想找到它，但其他人总找各种理由妨碍他们。
When SpongeBob and Patrick hear the story of The Main Drain, they try looking for it. It gets hard when everyone keeps getting in their way.
计划指出排水沟和排水管固定装置，而管道工则构想如何布置管道和连接到总水管和下水道。
The plans show the drains and plumbing fixtures, but the plumber figures out how to route the pipes and hook up to the water main and sewer.
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