Hottest, wettest tunnel holed through

Crocker, E.R. | Engineering Index Backfile | 1955

World's longest continuous tunnel holed through

Engineering Index Backfile | 1923

Turnpike tunnels holed through

Gould, W.F. | Engineering Index Backfile | 1940

$News\; from\; Japan:$ Subway tunnel to airport completed; Expressway tunnel holed through; Construction ministry issues directive

Elsevier | 1993

Performance evaluation of pin-holed pipe anchor for fractured zone in subsea tunnel

Kim, Doo-Rae | Online Contents | 2016