機器
builder
building
cement
concrete
construction
construction site
contractor
damage
danger
development
dry
dust
epoxy
equipment
factory
floor
floor heating
grinding
hard
heavy
helmet
industrial
industry
job
labor
machinery
maintenance
manufacturing
operation
person
polish
polished
polishing
power
process
production
professional
renovation
safety
slab
smooth
steel
surface
technology
tool
work
worker
working
workshop
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