英文關鍵字
engineering
design
quarry
mining
line
symbol
industrial
process
equipment
machine
technology
industry
iron
coal
processing
vibration
assessment
device
manufacturing
plant
excavator
mineral
limestone
environmental
opencast
goldmine
dust
quality
bulk
handling
system
sales
maintenance
repairs
fabrication
manufacture
factory
crusher
spare
construction
supervision
monitoring
material
icon
motion
graphic
animation
pictogram
hd
animated
item
sign
black