[1123] 1) — 10-2 1988 (new austrian tunnelling method) y

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Page 1: [1123] 1) — 10-2 1988 (New Austrian Tunnelling Method) Y
Page 2: [1123] 1) — 10-2 1988 (New Austrian Tunnelling Method) Y
Page 3: [1123] 1) — 10-2 1988 (New Austrian Tunnelling Method) Y
Page 4: [1123] 1) — 10-2 1988 (New Austrian Tunnelling Method) Y