英文關鍵字
horizontal
drilling
rig
lowers
directional
rotary
drill
process
laying
pipe
utilities
business
technology
construction
pipeline
rod
underground
vehicle
milling
machine
work
boring
well
conduit
dig
direct
ground
direction
industrial
tubing
piping
machinery
installing
soil
sidewalk
industry
mining
exploration
plumbing
engineering
infrastructure
driller
hdd