英文關鍵字
add
adjust
batteries
battery
black
box
business
car
cell
changeable
charge
charger
cleaning
commercial
container
deep
distilled
dry
economy
electric
electrical
energy
equipment
factory
forklift
full
heavy
industrial
industry
level
low
machine
module
power
recharging
repair
safety
storage
technology
tool
transportation
truck
use
volt
warehouse
water
work
worker