英文關鍵字
abstract
analysis
binding
black
bond
business
classic
cogs
concept
conceptual
connect
cooperation
design
engine
engineering
factory
gear
gearbox
gears
grey
idea
industrial
industry
interlock
machine
macro
mechanical
mechanics
mechanism
metal
metallic
motion
movement
network
parts
planning
precious
progress
rotate
shine
spares
steel
strategy
success
successful
team
teamwork
teeth
wheel
work