handhole with butt welded flange

例句：

1. 1. The engineercarefully removed the handhole cover to inspectthe pipes.
   工程师小心翼翼地移除了手孔盖来检查管道。
2. 2. The construction crew hadto remove the handhole cover to accessthe electrical wiring.
   施工队不得不移除手孔盖来接触电线。
3. 3. The maintenancetechnician replaced the damaged handhole cover witha new one.
   维护技术人员用一个新的手孔盖替换了损坏的盖子。