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Tunnel widening -- Diamond drills used for Wyoming job
Unique use of diamond drills for widening three hard rock, unlined Wyoming highway tunnels without interrupting road traffic except for 2 short periods daily; illustrated description of drilling and blasting procedure. (see also Explosives Engr v 25 n 5 Sept-Oct 1947 p 148-50, 154)
Tunnel widening -- Diamond drills used for Wyoming job
Unique use of diamond drills for widening three hard rock, unlined Wyoming highway tunnels without interrupting road traffic except for 2 short periods daily; illustrated description of drilling and blasting procedure. (see also Explosives Engr v 25 n 5 Sept-Oct 1947 p 148-50, 154)
Tunnel widening -- Diamond drills used for Wyoming job
Western Construction News
Pierce, R.V. (author)
1947
3 pages
Article (Journal)
English
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