 |
| |||
| monkey; monkey gangway; cross hole | |||
| air pass; air slit; bolt; bolthole; break-through; breakthrough; cross-adit-cut; cross-adit hole; duct; jack hole; opening; posting hole; room cross-cut; spout (zwischen Parallelstrecken); stenting; stenton; stroup; thirl; thurl; windway | |||
