acetylene

activity

aged

burner

cassation

construction

corrosion

cut

cutter

demolition

destroy

destruction

dirty

disposal

dust

dusty

equipment

factory

fire

flame

gas

glow

heat

hose

indoor

industrial

industry

installation

manpower

manually

melt

metal

metalwork

obsolete

old

oxyacetylene

oxygen

pile

pollution

rusted

rusty

smoke

spark

steel

system

torch

tube

welder

work

worker