英文關鍵字
20s
african
american
apprentice
apprenticeship
bending
black
caucasian
engineer
engineering
equipment
ethnicity
factory
female
girl
hydraulic
indoors
industry
learning
lockdown
machine
machinery
male
man
manual
manufacturing
medium
men
occupation
operating
overalls
people
person
precision
shot
skilled
teaching
teen
teenage
teenager
together
trainee
training
tube
twenties
two
use
women
worker
working
workman
workshop
years
young