deformation
機器
background
bad
bolt
bolt and screw
bolt thread
bolts and nuts
close up
construction
crack
damaged
damaged bolt
damaged threads
deformed
design
destroyed
detail
engineer
engineering
equipment
failure
fault
faulty
faulty product
fracture
hardware
inaccurate
incorrect
industrial
industry
iron
macro
maintenance
malformed
material
mechanic
metal
metal thread
metallic
old
poor quality
poor workmanship
repair
screw
screw thread
steel
thread
tool
wrong