英文關鍵字
aluminum
automation
crane
device
energy
equipment
factory
hang
harmful
heavy
helmet
human
industrial
industry
iron
job
loading
machine
machinery
man
manufacture
manufacturing
metal
metallurgical
mill
motion
move
movement
oversees
pano
plant
power
press
processing
production
roll
rotates
samara
shop
siemens
smoke
steam
steel
technical
technology
transportation
uniform
worker
workshop