We are picking up every able-bodied man not in essential industry.

Hatmaking was the essential industry, and can be traced to 1792.

Mining has been an essential industry for mankind throughout history.

The girls helped make bandages and other needed items, or worked in essential industries after school.

The Act also gave additional powers to the minister to announce strikes illegal in essential industries.

He twice volunteered for military service but was told to remain in an essential war-related industry.

Those transferred would return to work in essential industry, although they could be called back to active duty if the Army needed them.

Factory workers in certain essential industries still must work.

Despite being an essential industry the works had difficulty obtaining suitable workers to build all the ships on its order books.

Fishing is also an essential industry, together with mining and lumber.