bulldozer

caterpillar

heavy

machinery

bricks

idling

rev

engine

hum

stop

start

hammer

smash

shift

move

rubble

excavate

digger

diesel

equipment

gear

motor

tool

moving

lifting

shifting

carry

carrying

excavating

building

site

derv

excavator

jcb

crawler

tracked

tractor

blade

backhoe

mine

mining

pit

quarry

trench

dig

digging

trenching

demolition

excavation

shank

idle

build

track