機器
adult
background
builder
building
closeup
company
concept
construction
contractor
cooperation
craftsman
dirty
engineer
expression
factory
glove
greeting
hand
handshake
happy
hard
human
industrial
industry
isolated
job
labor
laborer
male
man
meeting
partnership
people
person
professional
protection
safety
shaking hands
structure
team
teamwork
tool
white
work
worker
working
workplace
workshop
worn