英文關鍵字
40s
apprentice
apprentices
apprenticeship
boy
caucasian
demonstrating
engineer
engineering
equipment
ethnicity
factory
female
forties
girl
indoors
industry
learning
lockdown
machine
machinery
male
man
manual
manufacturing
mature
medium
men
occupation
operating
overalls
people
person
precision
shot
skilled
teaching
teen
teenage
teenager
three
together
trainee
training
women
worker
working
workman
workshop
years
young