assembler
collector
connection
construction
contractor
drift miner
driver
equipment
fix
handyman
industrial
industry
installer
installing
interior
job
joiner
labor
laborer
maintenance
man
mechanic
mine
mounter
occupation
people
person
plumber
profession
professional
reconstruction
renovation
repair
repairman
reservoir
service
sewer
sinker
subterranean
tool
tunnel
tunneller
underground
uniform
worker
working