Automatic-closing safety fence gate with lower rotating shaft

XIE XIONGSHI | Europäisches Patentamt | 2015

Bluestone Lake Intake Shaft

Maloney, W. J. / Smith, A. J. / Tuneblom, H. E. | British Library Conference Proceedings | 1999

Bluestone Lake intake shaft

Maloney, W.J. / Smith, A.J. / Tuneblom, H.E. | British Library Conference Proceedings | 1998

Lower Granite Dam Radial Gate Inspection and Testing

W. Edwards / S. Planck | NTIS | 2001

Intake shaft protected against frost

Dunbar, F.B. | Engineering Index Backfile | 1938