colleague
belt
breath
career
caucasian
construction
contractor
crude oil
discussing
drill
employee
engineer
engineering
equipment
factory
foreman
gas
group of people
hard hat
helmet
industrial
industry
job
laborer
learning
male
man
manual
manufacturing
mask
metalwork
occupation
open
person
pipeline
place of work
plan
plant
professional
protective
rig
safety
specialist
station
steel
teamwork
technology
warehouse
work
working
定額
Workers in hard hats are trained to put on a breathing apparatus mask. Operators of the petrochemical industry prepare equipment for work in the gas room.の素材 [FY310182529268]
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