line grinding
81Sander — This article is about the power tool. For other uses, see Sander (disambiguation). A random orbit sander, with disks of various grit sizes A sander is a power tool used to smooth wood and automotive or wood finishes by abrasion with sandpaper.… …
82South Luffenham — is a village in the county of Rutland in the East Midlands of England.It once had a railway station that was located to the north of the village and also served the neighbouring village of North Luffenham. It was opened in 1848 and closed in 1966 …
83Concrete saw — A concrete saw being readied for use. The man in the background is preparing the hose to deliver water to cool the saw, whilst the operator is moving the saw to the required position. A substantial engine powers the unit …
84Mechanical filter — Figure 1. A mechanical filter made by the Kokusai Electric Company intended for selecting the narrow 2 kHz bandwidth signals in SSB radio receivers. It operates at 455 kHz, a common IF for these receivers, and is dimensioned 45×15×15 mm ( …
85Ditmar Award results — Main article: Ditmar Award The Ditmar Award is Australia s oldest and best known science fiction, fantasy and horror award, presented annually at the Australian NatCon since 1969. The historical nominations and results (listed in boldface) of the …
86Bedrock mortar — A bedrock mortar (or BRM) is a set of man made circular depressions in a rock outcrop or naturally occurring slab, used by early peoples for grinding of grain, acorns or other food products. [ [http://www.heritageedu.com/glossary.htm#bedrock… …
87Stone Age — the period in the history of humankind, preceding the Bronze Age and the Iron Age, and marked by the use of stone implements and weapons: subdivided into the Paleolithic, Mesolithic, and Neolithic periods. [1860 65] * * * First known period of… …
88military technology — Introduction range of weapons, equipment, structures, and vehicles used specifically for the purpose of fighting. It includes the knowledge required to construct such technology, to employ it in combat, and to repair and replenish it.… …
89Beam compass — A beam compass is a compass with a beam and sliding sockets or cursors for drawing and dividing circles larger than those made by a regular pair of compasses.[1] The instrument can be as a whole, or made on the spot with individual sockets… …
90Welding defect — A welding defect is any flaw that compromises the usefulness of the finished weldment. According to the American Society of Mechanical Engineers (ASME) welding defect causes are broken down into the following percentages: 41% poor process… …
