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The Older term is, and still widely used Hammer Head Cranes- from the shape. They were initially used in Ship construction in Europe and England. a German shipyard had the record-breaking ( Kaiser Bill) which could hoist 340 tons- a record for this crane type- in the early years of the past century. They were comparitively rare on fixed ground construction sites , say in the Interwar years- but this may have been a cause and effect of the Depression economy- these things are expensive to build- and operate. so-called Center-hung derricks- still in use- were more common. these had the drawback the man running the hoist had to follow telegraph bell signals( something like a marine telegraph)- but from his duty station could not see the load- the crane operator and rigger, could, of course.
What else can I help you with?
What is the tallest tower in the US?
me
Inventions in 1998?
In the year 1988, The Hubble Telescope and the Us Stealth bomber were unveiled. On the medical forefront, Laser eye surgery and Prozac were introduced.
What is a 1970 penny made of?
The 1970 US Lincoln Cent is composed of 95% copper and 5% zinc. The current copper plated zinc-core composition was introduced in mid 1982.
What inventions happened in 1963?
Cassette Tapes: They were invented in Germany for the Berlin Radio Show and were introduced to the US in 1970.Lava Lamps: Invented by Edward Craven Walker and originally known as "astro lamps".
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farts
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1983
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althea gibson
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February 10, 1975
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in the us
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Is the Willis Tower the largest tower in US?
yes
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