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Summary
| Description |
English: Photograph of a Butterworth access hatch showing ventilation tube, circa 1970 |
| Date | Unknown date |
| Source | United States Navy, Naval Safety Center, Acquisition Safety -- Confined Spaces |
| Author | United States Navy |
Licensing
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This file is a work of a sailor or employee of the U.S. Navy, taken or made as part of that person's official duties. As a work of the U.S. federal government, it is in the public domain in the United States.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | ||
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:48, 15 June 2014 | | 160 × 222 (13 KB) | Bejnar | User created page with UploadWizard |
File usage
The following pages on the English Wikipedia use this file (pages on other projects are not listed):
