96/383/2 Rock bolts, prototypes (2), test materials (2) and hollow bar samples (2), 'The Screw Bolt', 'Powerhouse Museum Selection 1995', steel/concrete, Dr Peter Gray, BHP Engineering Pty Ltd, Wollongong, 1993-1995 1993 - 1996

Gray, Peter, BHP Engineering Pty Ltd

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Courtesy of
Powerhouse Museum