Metal supports for protecting the trench.
Keywords
system,
excavation,
excavating,
resource,
trench,
box,
support,
prevent,
equipment,
underground,
dirtied,
safety,
utility,
activity,
damaging,
dig,
shoveling,
frame,
insulation,
investment,
labourer,
machinery,
maintenance,
movement,
new,
outdoors,
pipeline,
deep,
piping,
reconstruction,
repair,
road,
sand,
sheeting,
shielding,
site,
surface,
technology,
under,
work,
bucket,
communication,
disrobed,
know-how