英文關鍵字
business
capacities
cistern
cylinder
drum
education
engine
equipment
fabric
factory
furnace
generators
hydraulic
industry
iron
machinery
material
materials
mix
modern
moving
new
power
powerful
processing
production
raw
rotate
rotates
rotating
spin
steel
stirring
tank
tanks
technology
textile
trommel
turbine
turbines
turn