File:Derricks. Greymouth NZ (14966562237).jpg
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Size of this preview: 800 × 491 pixels. Other resolutions: 320 × 197 pixels | 640 × 393 pixels | 1,024 × 629 pixels | 1,280 × 786 pixels | 2,322 × 1,426 pixels.
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| Description |
A derrick is a lifting device composed of one tower, or guyed mast such as a pole which is hinged freely at the bottom. A basic type of derrick is controlled by lines (usually four of them) connected to the top of the mast, powered by some means such as man-hauling or motors, so that the pole can move in all four directions. A separate line runs down from the top of the mast and over its bottom with a hook on the end, as with a crane for lifting the loads. There are also other types of derrick that may involve different ways to control the mast and a use of a boom. It is commonly used in docks and on board ships. Some large derricks are mounted on dedicated vessels, and are often known as "floating derricks". |
| Date | |
| Source | Derricks. Greymouth NZ |
| Author | Bernard Spragg. NZ from Christchurch, New Zealand |
| Camera location |  | View this and other nearby images on: OpenStreetMap |  |
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This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. |
| The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
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This image was originally posted to Flickr by Bernard Spragg at https://flickr.com/photos/88123769@N02/14966562237. It was reviewed on 11 April 2021 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-zero. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 08:10, 11 April 2021 | | 2,322 × 1,426 (3.1 MB) | Rudolphous (talk | contribs) | Transferred from Flickr via #flickr2commons |
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