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A post hole clam-shell digger, also called post hole pincer or simply post hole digger, is a tool consisting of two articulated shovel-like blades, forming an incomplete hollow cylinder about a foot long and a few inches wide, with two long handles that can put the blades in an "open" (parallel) position or a "closed" (convergent) position.
A lining bar is used to shift the alignment of railroad tracks, to manipulate some types of railroad track jacks, to "nip up" or lift ties and rails, and as a digging tool. Lining bars have a tapered form. They often have a square cross section between one and 1-1/2 inches at one end. They may have a pyramidal, wedge, or pinch point.
Excavator digging in Tokyo, Japan Kobelco Excavator in shovel configuration. The term "backhoe" refers to the action of the bucket, not its location on the vehicle. [2] That is, a backhoe digs by drawing earth backwards, rather than lifting it with a forward motion like a person shovelling, a steam shovel, or a bulldozer.
A clay pipe discovered while excavating an old bottle dump (ca. 1870) Dump digging can yield different items and artifacts in each location. A town dump can be somewhat different than a farm dump or a railroad dump, but in each case there could be industrial-age pottery, stoneware, tobacco pipes, military relics like bayonets and gun barrels, musket balls, uniform buttons and other buttons ...
Snowmobiles once used cleated tracks, but racing snowmobiles are banned from using cleated track for safety reasons and instead use rubber tracks. [ 6 ] Protrusions molded into rubber tractor tire treads are known as lugs, as are cleats for round wheels, [ citation needed ] which perform a similar function.
This much improved mechanism gave a proper elliptical motion and was used until 1988. Page modernized its draglines further with the 700 series in 1954. Page's largest dragline was the Model 757 delivered to the Obed Mine near Hinton, Alberta in 1983. It featured a 75-yard bucket on a 298-foot boom and an operating weight of 4,500 tons.