英文關鍵字
aggregation
air
building
capacity
construction
cooling
creepy
enterprise
equipment
evaporation
external
factory
hard
heavy
highpowered
industrial
industry
iron
jet
mechanism
metal
metallurgical
old
outdoors
pipe
piping
power
raid
rolling
rotates
rotating
rusty
smelting
steam
steel
tank
technics
technology
turbine
water