英文關鍵字
accuracy
beam
construction
equipment
grade
horizontal
industrial
industry
instrument
job
laser
level
leveling
levelling
light
line
measure
measurement
precision
red
rod
ruler
staff
surveying
surveyor
technology
tool
topography
work
英文關鍵字
accuracy
beam
construction
equipment
grade
horizontal
industrial
industry
instrument
job
laser
level
leveling
levelling
light
line
measure
measurement
precision
red
rod
ruler
staff
surveying
surveyor
technology
tool
topography
work