|
Axe
An axe (; sometimes spelled ax in American English; American and British English spelling differences#Miscellaneous spelling differences, see spelling differences) is an implement that has been used for thousands of years to shape, split, and cut wood, to harvest timber, and as a weapon. The axe has many forms and specialised uses but generally consists of a head with a handle (also called "haft" or "helve"). Before the modern axe, the Stone Age, stone-age hand axe without a handle was used from 1.5 million years Before Present, BP. Hafted axes (those with a handle) date only from 6,000 BC. The earliest examples of handled axes have heads of stone with some form of wooden handle attached (hafting, hafted) in a method to suit the available materials and use. Axes made of copper, bronze, iron and steel appeared as these technologies developed. The axe is an example of a simple machine, as it is a type of Wedge (mechanical device), wedge, or dual inclined plane. This reduces t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hand Axe
A hand axe (or handaxe or Acheulean hand axe) is a Prehistory, prehistoric stone tool with two faces that is the longest-used tool in human history. It is made from stone, usually flint or chert that has been "reduced" and shaped from a larger piece by knapping, or hitting against another stone. They are characteristic of the lower Acheulean and middle Palaeolithic (Mousterian) periods, roughly 1.6 million years ago to about 100,000 years ago, and used by ''Homo erectus'' and other early humans, but rarely by ''Homo sapiens''. Their technical name (biface) comes from the fact that the archetypical model is a generally bifacial (with two wide sides or faces) and almond-shaped (amygdaloidal) lithic flake. Hand axes tend to be Symmetry, symmetrical along their longitudinal Symmetry axis, axis and formed by pressure or percussion. The most common hand axes have a pointed end and rounded base, which gives them their characteristic almond shape, and both faces have been Knapping, knap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Broadaxe
A broadaxe is a large broad-headed axe. There are two categories of cutting edge on broadaxes, both are used for shaping logs into beams by hewing. On one type, one side is flat, and the other side beveled, a basilled edge, also called a side axe, single bevel, or chisle-edged axe. On the other type, both sides are beveled, sometimes called a double bevel axe, which produces a scalloped cut. On the basilled broadaxe the handle may curve away from the flat side to allow an optimal stance by the hewer in relation to the hewn surface, and to allow clearance for the hewer's hands. The flat blade is to make the surface flat but can only be worked from one direction and is right-handed or left-handed. The double bevel axe has a straight handle and can be swung with either side against the wood. A double-beveled broad axe can be used for chopping or notching as well as hewing. When used for hewing, notches are chopped in the side of the log down to a marked line, a process called scorin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hatchet
A hatchet (from the Old French language, Old French , a diminutive form of ''hache'', 'axe' of Germanic origin) is a Tool, single-handed striking tool with a sharp blade on one side used to cut and split wood, and a hammerhead on the other side. Hatchets may also be used for hewing when making flattened surfaces on logs; when the hatchet head is optimized for this purpose it is called a hewing hatchet. The earliest known use of the noun hatchet is in the Middle English period (1150—1500) Although 'hand axe' and 'hatchet' are often used interchangeably in contemporary usage, 19th and 20th century American manufacturers and retailers (Collins, Kelly, Vaughan, Warren, Mann; Simmons, Shapleigh, Sears, et al.) unanimously distinguished hatchets from hand axes in their product catalogs, listing them in separate groupings. A ''hand axe'' (also known by terms including "camp axe", "belt axe", "hunters axe" and others) is a short-handled woods tool. A ''hatchet'' is a short-handled co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hafting
Hafting is a process by which an Artifact (archaeology), artifact, often made of bone tool, bone, stone tool, stone, or tool steel, metal is attached to a ''haft'' (handle or strap). This makes the artifact more useful by allowing it to be launched by a Bow and arrow, bow (arrow), thrown by hand (spear), or used with more effective leverage (axe). When constructed properly, hafting can tremendously improve a weapon's damage and range. It is estimated that hafted weapons were most common during the Upper Paleolithic and Middle Paleolithic. It was one of the first tools where Hominini, hominins took separate elements and united them into a single tool. The development of hafting is considered by archaeologists to have been a significant milestone. It was not only an improvement in the technology at the time; it also showed the progression of the human mind toward a world of complex tool-making. Hafting weapons is perhaps best known for its use by humans in prehistory, but it is stil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flint Axe
A flint axe was a Flint tool used during prehistoric times to perform a variety of tasks. These were at first just a cut piece of flint stone used as a hand axe but later wooden handles were attached to these axe heads. The stone exhibits a glass-like fracture similar to obsidian, and can be knapped to form large blades. The offcuts were sharp enough to be used a small flint knives, while the larger parts of a knapped nodule could be polished to form an axe-head. They competed with other hard rocks such as greenstone, which were produced at Langdale in the British Lake District and got larger as working continued. They tend to be larger and heavier than the simple axes, and are sometimes known as axe-hammers. There are many different types of flint axes. A specific one that appeared during the Early Stone Age was the core axe. This is an unpolished flint axe that is roughly hewn. The cutting edge is usually the widest part and has a pointed butt. Flake axes are created from the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limbing
Limbing or delimbing is the process of removing branches from a standing or fallen tree trunk. In logging, limbing follows felling. Limbing plays a role in fire prevention by removing branches from live trees that can otherwise serve as part of a fuel ladder allowing a fire to climb from the ground into the tree canopy. A California fire prevention guide recommends to "Remove all tree branches at least 6 feet .8 metersfrom the ground" and "Allow extra vertical space between shrubs and trees." Ready For Wildfire, In , limbing can be synonym ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copper
Copper is a chemical element; it has symbol Cu (from Latin ) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color. Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins, and constantan used in strain gauges and thermocouples for temperature measurement. Copper is one of the few metals that can occur in nature in a directly usable, unalloyed metallic form. This means that copper is a native metal. This led to very early human use in several regions, from . Thousands of years later, it was the first metal to be smelted from sulfide ores, ; the first metal to be cast into a shape in a mold, ; and the first metal to be purposely alloyed with another metal, tin, to create bronze, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shang Bronze Yue 2
The Shang dynasty (), also known as the Yin dynasty (), was a Chinese royal dynasty that ruled in the Yellow River valley during the second millennium BC, traditionally succeeding the Xia dynasty and followed by the Western Zhou dynasty. The classic account of the Shang comes from texts such as the ''Book of Documents'', ''Bamboo Annals'' and ''Shiji''. Modern scholarship dates the dynasty between the 16th and 11th centuries BC, with more agreement surrounding the end date than beginning date. The Shang dynasty is the earliest dynasty within traditional Chinese history that is firmly supported by archaeological evidence. The archaeological site of Yinxu, near modern-day Anyang, corresponds to the final Shang capital of Yin. Excavations at Yinxu have revealed eleven major royal tombs, the foundations of former palace buildings, and the remains of both animals and humans that were sacrificed in official state rituals. Tens of thousands of bronze, jade, stone, bo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fibreglass
Fiberglass (American English) or fibreglass ( Commonwealth English) is a common type of fiber-reinforced plastic using glass fiber. The fibers may be randomly arranged, flattened into a sheet called a chopped strand mat, or woven into glass cloth. The plastic matrix may be a thermoset polymer matrix—most often based on thermosetting polymers such as epoxy, polyester resin, or vinyl ester resin—or a thermoplastic. Cheaper and more flexible than carbon fiber, it is stronger than many metals by weight, non- magnetic, non- conductive, transparent to electromagnetic radiation, can be molded into complex shapes, and is chemically inert under many circumstances. Applications include aircraft, boats, automobiles, bath tubs and enclosures, swimming pools, hot tubs, septic tanks, water tanks, roofing, pipes, cladding, orthopedic casts, surfboards, and external door skins. Other common names for fiberglass are glass-reinforced plastic (GRP), glass-fiber reinforced pla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RV Thomas G
A recreational vehicle, often abbreviated as RV, is a motor vehicle or trailer (vehicle), trailer that includes living quarters designed for accommodation. Types of RVs include motorhomes, campervans, coach (bus), coaches, Caravan (trailer), caravans (also known as travel trailers and campers), Caravan (trailer)#Fifth-wheel trailer, fifth-wheel trailers, popup campers, and truck campers. Typical amenities of an RV include a kitchen, a bathroom, and one or more beds. RVs can range from utilitarian – containing only sleeping quarters and basic cooking facilities – to luxurious, with features like air conditioning (AC), water heaters, televisions and satellite receivers, and quartz countertops. Types RVs can be either trailers that are towed by vehicles or vehicles that can be driven themselves. Most RVs have one level, but there are also some with two levels. To save space while traveling, larger RVs often have slide-outs or canopies that open up when parked. RVs that can ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
