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The dust cap (also known as dust dome, or dome) is a gently curved dome mounted either in concave or convex orientation over the central hole of most loudspeaker diaphragms. It protects the inner mechanics (such as the pole pieces and the voice coil ) from small particles (which can cause rubs ) and other contamination.
A dustcap is a small cover used on the valve stem of a bicycle or car tire to prevent dust or other small particles from entering the valve and damaging it. Dustcaps are usually made from plastic but may occasionally be made of metal. The dustcap is internally threaded and is secured by screwing it onto the end of the stem.
A hubcap or hub cap is a decorative disk on an automobile wheel that covers at minimum the central portion of the wheel, called the hub. [1] An automobile hubcap is used to cover the wheel hub and the wheel fasteners to reduce the accumulation of dirt and moisture.
Schrader valve components (from left to right) the valve core closed (top) and open (bottom), the order of assembly, end view of stem without core and with core (top) and stem with the dust cap on (bottom). The core has a short outer thread which is screwed into the inner thread of the stem. The visible outer thread of the stem holds the dust cap.
The Meyrick Helmet is a Celtic: Brythonic helmet that is likely to have originated from Northern England in the 1st century AD. The flat plane extending from the rim is intended to protect the back of the neck, however some theorise it may have been turned in reverse to shield the eyes from sunlight whilst in battle German M43-style field cap of the "Bundesgrenzschutz" (BGS) (now called ...
Dust-producing surfaces cover one-third of the global land area. These are made up of hyper-arid regions like the Sahara, which covers 0.9 billion hectares, and drylands, which occupy 5.2 billion hectares. [5] Dust in the atmosphere is produced by saltation and abrasive sandblasting of sand-sized grains, and it is transported through the ...
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Edwin Charles Tubb (15 October 1919 – 10 September 2010) was a British writer of science fiction, fantasy and western novels. The author of over 140 novels and 230 short stories and novellas, Tubb is best known for The Dumarest Saga (US collective title: Dumarest of Terra), an epic science-fiction saga set in the far future.