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A roller-cone bit is a drill bit used for drilling through rock that features 2 or 3 abrasive, spinning cones that break up rock and sediment as they grind against it. Roller-cone bits are typically used when drilling for oil and gas. [1] A water jet flowing through the bit washes out the rock in a slurry. [2]
A brushcutter (also called a brush saw, clearing saw or gasoline goat) is a powered garden or agricultural tool used to trim weeds, small trees, and other foliage not accessible by a lawn mower or rotary mower. Various blades or trimmer heads can be attached to the machine for specific applications. It consists of: A power unit held close to ...
Rolling tray; Rolling kit; Organic hemp wick [16] RAW founder, Josh Kesselman, designed and sells an umbrella with a slot for holding a cone and a mouthpiece so people can smoke and walk in the rain. [17] Kesselman said that thinking of fun and eccentric products that resonate with the business is part of the joy of being in the rolling papers ...
Rolling cone motion is the rolling motion generated by a cone rolling over another cone. In rolling cone motion, at least one of the cones is convex , while the other cone may be either convex, or concave, or a flat surface (a flat surface can be regarded as a special case of a cone whose apex angle equals π {\displaystyle \pi } ).
Killing cones are used to facilitate the slaughter of poultry, normally chicken, ducks, or geese. [1] Such cones come in a number of sizes to accommodate different-sized birds. The cone functions by holding a bird in place - a captive bird can be placed head first into the funnel so that the animal's head hangs down through the small part of ...
That is, cones through which all other cones factor. A cone φ from L to F is a universal cone if for any other cone ψ from N to F there is a unique morphism from ψ to φ. Equivalently, a universal cone to F is a universal morphism from Δ to F (thought of as an object in C J), or a terminal object in (Δ ↓ F).
Conehead or cone head may refer to: Animals. Conocephalinae, a subfamily of insects, especially: Conocephalus, a genus of insects; Neoconocephalus, a genus of insects;
A cone to an object X is just a morphism with codomain X. A morphism f : Y → X is a limit of the diagram X if and only if f is an isomorphism. More generally, if J is any category with an initial object i, then any diagram of shape J has a limit, namely any object isomorphic to F(i). Such an isomorphism uniquely determines a universal cone to F.