英文關鍵字
drive
engineering
heavy
industrail
industries
industry
machine
mechanical
mechanism
metal
movement
moving
parts
power
rail
railway
rock
round
running
steel
stone
technology
traffic
train
transport
transportation
vibrant
wheel
英文關鍵字
drive
engineering
heavy
industrail
industries
industry
machine
mechanical
mechanism
metal
movement
moving
parts
power
rail
railway
rock
round
running
steel
stone
technology
traffic
train
transport
transportation
vibrant
wheel