ball

steel

activity

air force base

background

backgrounds textures

balls

brass

brass company

steel ball

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Conversion. Copper and brass processing. This sample of brass strip is being tested on a Rockwell Hardness Testing Machine. This test is based upon the depth a steel ball penetrates the metal. A minor load is applied first to hold the ball in position, and then a major load is applied. The dial on the machine measures the depth of the penetration. This test is made to check the physical properties of the metal. Chase Copper and Brass Company, Euclid, Ohio

Conversion. Copper and brass processing. This sample of brass strip is...

Picryl description: Public domain photograph of an office worker, 1930s, free to use, no copyright restrictions.

A polished steel ball is used to reflect sunlight so that weather technicians can observe sunspot activity safely. The technicians are assigned with the Solar Optical Observing Network (SOON)

A polished steel ball is used to reflect sunlight so that weather tech...

The original finding aid described this photograph as: Base: Holloman Air Force Base State: New Mexico (NM) Country: United States Of America (USA) Scene Camera Operator: Eddie Mccrossan Release Status: Re... More

A bunch of metal balls that are on a table. Balls many small, backgrounds textures.

A bunch of metal balls that are on a table. Balls many small, backgrou...

A close up of a pile of metal balls / A close up of a sheet of metal beads public domain military photo.