英文關鍵字
belt
drive
mechanism
diesel
engine
water
pump
action
running
pulley
centrifugal
delivering
agricultural
driven
belting
chain
engines
motor
belts
engineering
equipment
hardware
industrial
industry
iron
machine
machinery
mechanic
mechanical
metal
objects
power
rotate
rubber
shaft
steel
technical
technology
tool
transmission
gear
assembly
automation
heavy
duty
system