機器
assembly
auto
background
ball
blueprint
calculator
chrome
circle
compasses
conveyor
design
diagram
drawing
drive
ellipse
engine
engineering
ferrule
friction
gear
gearing
glitter
graphic
industry
line
linear
machinery
mechanic
mechanical
mechanism
modern
motor
office
oval
paper
plan
print
ring
rolled
roller
rolling
round
sketch
steel
technic
technical
technology
transportation
wheel