機器
annealing
bead
burns
cable
carbon
ceramic
confident
connect
connection
construction
control
craft
detail
electric
electricity
electronic
energy
equipment
factory
flex
flexibility
hardening
heat
industrial
industry
instrument
insurance
iron
joint
manufacturing
material
metal
pattern
pipe
pipeline
production
rig
seam
splice
stabilizing
steel
surface
technology
tube
voltage
work