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Halloween or Hallowe'en (a contraction of Hallows' Even or Hallows' Evening), also known as Allhalloween, All Hallows' Eve,or…
https://www.youtube.com/watch?v=0RZUET-MdXw&list=PLCyJUW1YwFqhfINwg_TUalHboBSdvVVXh&index=4
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Sonar pipeline inspection system applied acoustic method to inspect the condition of liquid-filled pipe. It can provide the…
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