action

arrange

balance

build

construction

contraction

cylinder

danger

day

diligent

equipment

expertise

factory

fluid

gas

hard

heating

height

helmet

industry

insulation

insurance

investments

isolation

job

line

liquid

maintenance

make

manually

metal

oil

overalls

pipeline

power

red

reflection

repair

stand

structure

sunny

system

task

tin

tool

work

worker

working

wring