機器
carriage
chassis
closeup
curve
detail
diesel
dump
engine
engineering
fuel
garbage
hard
heap
horizontal
hydraulic
infrastructure
iron
line
locomotive
logistics
maintenance
mechanic
mechanical
metal
modern
motor
nobody
old
pneumatic
power
public
rail
railroad
railway
repair
robotic
scrap
technical
time
track
train
transport
transportation
vehicle
wagon
wheel
yellow