Man presenting boiler to apprentices
Schlüsselwörter
boiler,
apprentice,
man,
overhaul,
occupation,
safety,
men at work,
job,
people,
device,
control,
inspector,
engineer,
equipment,
show,
explain,
demonstrate,
instructing,
learn,
jacket,
industrial,
heat,
pressure,
gauge,
pipe,
dial,
interest,
plumber,
plumbing
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