big
building
bulldozer
cabin
caterpillars
colore
construction
design
dig
ditch
drive
durable
earth
ecology
equipment
force
heavy
hole
invention
iron
load
machine laver
mechanics
mechanism
metal
mobile
old
passability
pit
power
powerful
processing
productivity
progress
resource
retro
rust
scattering
secondhand
skilled
soil
solid
stable
steel
transport cologique
unit
weight
work