tunnelling Definition

excavating, superconductive, digging, underpass, dredging, crossing, subway, canal, tapping, channel, geotechnics, excavation, formwork, lycopodium, steelwork, pipelaying, tramming, galvanising, opencast mining, rolling stock, geomechanics, underground, falsework, earthworks, countermine, pipework, sarmatia, channel tunnel, shipka pass, underbridge, earthmoving, ropeway, hydrometallurgy, viaducts, altdorf, gasholder, rockface, tramways, haulage, grouting, draughting, cableway, construction, electron optics, transalpine, passenger train, geotechnical, diggings, manoeuvring, insitu, optical fibre, cathodic protection, sartre, kuznetsk, fibre optic cable, trenching, petrography, catenary, shunter, draughtsman, metallurgy, deme, logistic support, funicular railway, fibre optics, opencut, izm, trolleybus, sounding rocket, boundary layer, diggers, railway, sappers, physical geography, caissons, plasma physics, visualisation, pathe, osmo, bailey bridge, headrace, inlaying, focal plane, prestressed concrete, prestressed, washery, nuclear submarine, canalization, broad gauge, conductors, engineering, pannonian, petroleum geology, penki, pgm, proton accelerator, reline, arc furnace, potholing, characterisation,