bang

belt

big

blast

buzz

chain

churn

clang

clank

conveyor

creak

crunch

danger

drip

drone

drop

eerie

equipment

factory

gear

grind

gritty

groan

hammer

hiss

hum

hydraulics

industrial

industry

leak

machine

manufacturing

mechanism

metal

pipe

piston

pound

press

pulse

rattling

roar

rumbling

sizzling

squealing

steam

storehouse

thud

thump

thwack

vibration

rattle

rumble

sizzle

squeal