英文關鍵字
accuracy
appliance
capacity
circling
class
combustion
cupboard
cycle
cylinder
desk
device
downward
education
energy
engine
equipment
experience
fuel
hand
indoor
industry
inside
instrument
instrumentation
laboratory
mechanical
metal
model
motion
movement
moves
object
pair
piston
precision
return
rotates
school
science
spin
stainless
study
technical
technologies
tool
two
upward
valve
yellow