機器
alternative
automobile
battery
business
car
carry
charge
charging
commerce
driving
dump
dumper
ecological
ecology
electric
electricity
energy
environment
environmental
equipment
freight
fuel
future
hard
heavy
industrial
industry
innovation
iron
large
loading
machinery
mine
mineral
mining
modern
ore
power
powerful
quarry
raw
rock
shipping
stone
technology
transportation
truck
vehicle
work