piping shaft

• 管道井

piping shaft的用法和样例：

例句

1. A protruding rim, edge, rib, or collar, as on a wheel or a pipe shaft, used to strengthen an object, hold it in place, or attach it to another object.
   凸缘车轮或管道上突出的边、缘、肋条或环圈，用来增加物体强度、固定物体或使某一物体附着在另一物体上