According to the passage, people used the term "slot machines' both for gambling devices and automatic vending machine, slot machines are not longer used in gambling industry, slot Machines had strange names, fed added a leaf symbol, What is not true according to the text, The car mechanic became the inventor of slot machines, Slot machines have come a long way since the time Fay introduced them, His machines used around 10 symbols, In 1910 slot machines gained popularity, What was not mantioned in the passage, Liberty Bell was a huge success and created  a thriving industry, Slot machines are also known as  one-armed bandit, a person playing a Slot machines can insert cash into a slot on the machine, since WW1 there has been no turning back, "upgraded" is closest in meaning to, promoted, diminished, improved, facilitated, It is stated in the passage that, Mania of slot machine began in spring 1887, Mill's changed Liberty Bells, There were 10 reels in Bell Machine, Poker machines allowed the users to win free fruit hitting.

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