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Under the general term "brush pass" is a wide range of techniques in which one clandestine operative passes a physical item to another operative. [14] "Brush" implies that the two people "brush" past one another, typically in a public place and preferably a crowd, where random people interfere with any visual surveillance.
Roughcast or pebbledash is a coarse plaster surface used on outside walls that consists of lime and sometimes cement mixed with sand, small gravel and often pebbles or shells. [1] The materials are mixed into a slurry and are then thrown at the working surface with a trowel or scoop.
A Gravel Gertie is a type of bunker designed to provide containment during the nuclear weapons assembly process, when the plutonium or highly enriched uranium "pit" is mated with the high explosive components and wired into the electronics (the "physics package") of the warhead.
Gravel mines, also called button mines, are small American-made air-dropped anti-personnel mines. They were used extensively during the Vietnam War as part of the McNamara Line . They were also used as a rapid-deployment area denial expedient , to provide a barrier during combat search and rescue (CSAR) operations between downed pilots or other ...
Loose chippings are loose gravel or stone fragments on a road surface and form a hazard to vehicles using that road. It may come from the road's chip seal. Causes include: Unbound surplus aggregate not removed from the surface when the road is resurfaced. Raveling of a chip seal or asphalt concrete pavement. This is usually the result of a poor ...
Washboarding effect on a road. Washboarding or corrugation [1] is the formation of periodic, transverse ripples in the surface of gravel and dirt roads.Washboarding occurs in dry, granular road material [2] with repeated traffic, traveling at speeds above 8.0 kilometres per hour (5 mph). [3]
Gravel opened up more about her health in a follow-up Instagram video posted this week, in which she recalled how "a few weeks ago, I woke up and half of my side was paralyzed with Bell's palsy ...
Gravel pit lakes are typically nutrient rich and can support thriving ecosystems, but can also present environmental issues such as the release of toxic metals into watersheds from the exposed rock. [2] Old, abandoned gravel pits are normally used either as nature reserves, or as amenity areas for water sports, landfills and walking.