above

alongside

and

bucket

bulldozer

caterpillar

coal

combine

development

digging

energy

engineer

engineering

enrichment

enterprise

excavator

factory

frost

geodesy

geology

giant

industry

iron

knots

labor

machine

machinery

mine

miner

mining

mountains

moves

open

outdoors

parts

production

profession

quarry

railway

rocks

rope

size

soil

sorting

stones

technique

tipper

tracks

tractor

useful

volume

winter

works