grinding line
81Caliper — For other uses, see Caliper (disambiguation). A vernier caliper …
82Chuck (engineering) — Self centering three jaw chuck and key with one jaw removed and inverted showing the teeth that engage in the scroll plate. The scroll plate is rotated within the chuck body by the key, the scroll engages the teeth on the underside of the jaws… …
83Sander — 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.… …
84South 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 …
85Concrete 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 …
86Mechanical 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 ( …
87Ditmar 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 …
88Bedrock 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… …
89Stone 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… …
90military 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.… …
