英文關鍵字
blizzard
blow
blower
blowing
bulldozer
car
city
cleaning
clear
cold
equipment
frozen
ice
industrial
industry
machine
machinery
male
man
municipal
outdoor
people
plow
plowing
removal
remove
removing
road
safety
season
service
shovel
snow
snowdrift
snowfall
snowplow
snowstorm
storm
street
thrower
tractor
transportation
truck
vehicle
weather
white
winter
work
worker