power-driven hand tools
41Nail gun — Pneumatic nail gun in use A nail gun, nailgun or nailer is a type of tool used to drive nails into wood or some other kind of material. It is usually driven by electromagnetism, compressed air (pneumatic), highly flammable gases such as butane or …
42Circular saw — This miter saw uses a circular saw mounted to cut at an angle Buzzsaw redirects here. For other uses, see Buzzsaw (disambiguation). The circular saw is a machine using a toothed metal cutting disc or blade. The term is also loosely used for the… …
43agriculture, origins of — Introduction the active production of useful plants or animals in ecosystems that have been created by people. Agriculture has often been conceptualized narrowly, in terms of specific combinations of activities and organisms wet rice production… …
44Tap and die — Not to be confused with Tool and die. Taps and dies are cutting tools used to create screw threads, which is called threading. A tap is used to cut the female portion of the mating pair (e.g., a nut). A die is used to cut the male portion of the… …
45Capital, Volume I — is the first of three volumes in Karl Marx s monumental work, Das Kapital, and the only volume to be published during his lifetime. Originally published in 1867, Marx s aim in Capital, Volume I is to uncover and explain the laws specific to the… …
46Table saw — A table saw, equipped for cutting large pieces of sheet stock. Other names Sawbench Classification Power tool Manufacturer Bosch, Makita …
47Die grinder — A pneumatic die grinder with a right angle head. A die grinder is a handheld power tool used to grind, sand, hone, polish, or machine material, typically metal but also plastic or wood. They are usually pneumatically driven, although versions… …
48Oxy-fuel welding and cutting — Oxyacetylene redirects here. For the song, see Cubanate. Side of metal, cut by oxygen propane cutting torch …
49stage design — Aesthetic composition of a dramatic production as created by lighting, scenery, costumes, and sound. While elements such as painted screens and wheeled platforms were used in the Greek theatre of the 4th century BC, most innovations in stage… …
50Four-slide — A four slide machine The same four slide machine from another angle A fou …
