n. manhole
misc. access hole
由于（锅炉的）检修孔里有人在，所以那个司机再也无法前进。
This driver cannot driver any farther because there is a man in the manhole.
虽然她很庆幸下水道检修孔当时不是满的，但这并没有让它看起来不明显。
While she's thankful the sewer wasn't full at the time, that didn't make it any less gross.
每个核桃过滤器应该有两个24“检修孔（ F – 02601A / B），一个应在碟形头盖上，另一个应位于传动装置支架上。
Two 24" manholes shall be installed on each nutshell filter (F-02601A/B), one is on the top of dished head, and the other one is located bellow the media support."
应用推荐