英文關鍵字
minerals
stone
symbol
monochrome
researching
gyro
theodolite
laser
level
equipment
background
online
engineering
technology
distance
inspection
measurement
topography
ecological
topographic
station
device
geodesy
exploration
measuring
drilling
instrument
geologic
geological
drill
icon
motion
graphic
animation
pictogram
hd
animated
item
sign
glyp