英文關鍵字
apartment
background
boiler
business
cap
clean
cleaner
close
company
concept
container
cylinder
device
domestic
employee
equipment
furniture
hand
home
house
housekeeping
housework
hygiene
instruction
interior
life
lifestyle
machine
modern
open
procedure
professional
purity
routine
safety
sanitary
seal
service
sign
steam
technology
tool
vapor
vessel
warning
water
wet
worker
yellow