機器
aluminum
builder
electricity
elements
engineering
expertise
factory
finishing
fridge
gloss
glossy
hand
handrail
horizontal
industrial
industry
males
man
manufacturing
mechanic
metal
occupation
one person
people
pipe
power
product
railing
repairing
round
safety
service
shiny
sparks
stainless
station
steel
strength
surface
tube
tubing
up
wheel
work
worker
working
workshop
young adult