这管子内径宽十英尺。
确保管子或其它圆柱形工具的内径合适，通过拖动已知外径的圆柱体或管子(清管器)穿行其中。
To guarantee the inside diameter of a pipe or other cylindrical tool by pulling a cylinder or pipe (rabbit) of known outside diameter through it.
通径规的直径就是管子生产商所能够确保的每一管子说明书上的内径。
The drift diameter is the inside diameter (ID) that the pipe manufacturer guarantees per specifications.
安装排水管时，要用内径10毫米以上的管子，长度不能超过5米，不要使管子向上弯。（如下图）
When installing the drain, use an inner diameter of 10 mm above the pipe, the length can not exceed 5 meters, not to bend the pipe up. (Below)
内径无阻碍的工具组合或管子组合的内部区域和表面的描述。
A description of the internal area and surfaces of a tool or tubular assembly through which there is an unimpeded internal diameter.
内径无阻碍的工具组合或管子组合的内部区域和表面的描述。
A description of the internal area and surfaces of a tool or tubular assembly through which there is an unimpeded internal diameter.
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