英文關鍵字
automobile
car
domestic
engine
factory
gear
industry
line
machine
making
manufacturing
metal
motor
part
plant
production
steel
technology
transportation
valve
vehicle
英文關鍵字
automobile
car
domestic
engine
factory
gear
industry
line
machine
making
manufacturing
metal
motor
part
plant
production
steel
technology
transportation
valve
vehicle