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Andreas Stihl designed and hand built his first chainsaw in 1926. [5] The saw was electrically powered, and weighed about 48 kg (106 lb). [6] Stihl grew slowly initially, as the chainsaws came to the market about the same time as the Great Depression; with manpower cheap, and old two-man saws proven, there was no need for power saws.
The breakaway head (also called breakoff or shear fastener) [75] is a high-security fastener whose head breaks off during installation, during or immediately after the driving process, to leave only a smooth surface. It typically consists of a countersunk flat-head bolt, with a thin shank and hex head protruding from the flat head.
Headframe of the #1 Shaft at Oyuu Tolgoi. A steel headframe is less expensive than a concrete headframe; the tallest steel headframe measures 87 m. [4] Steel headframes are more adaptable to modifications (making any construction errors easier to remedy), and are considerably lighter, requiring less substantial foundations.
"Any piece of information, no matter how small, could make a difference." JonBenét's brother John Andrew Ramsey told The Post. "Your decision to come forward could help bring the answers we so ...
What reviewers say 💬. Nearly 79,000 Amazon shoppers rave about this super-sucker. Pros 👍 “This is by far the lightest vacuum we've ever owned and THE quietest,” wrote one fan. “It's ...
Early bird gets the worm! Jay Leno opened up about his unusual sleeping habits on the Dec. 22 episode of Bill Maher’s Club Random podcast and revealed he only gets four hours of sleep a night ...
Appalachian State has fired head football coach Shawn Clark after five seasons. The Mountaineers went 5–6 this year (3–5 in the Sun Belt), the program's first losing campaign since its final ...
The erase head is powered during recording from a high frequency source (usually the same oscillator that provides the AC bias). In some inexpensive cassette recorder designs, the erase head is a permanent magnet that is mechanically moved into contact with the moving tape only during recording.