Four bar #linkage. It's one of those things that you don't learn
  in #science. You #learn in #engineering. #Bicycle #train
  #suspension
  [vine id = "MEmxVQYX3Eb"]
  Four bar #linkage. It's one of those things that you don't learn
  in #science. You #learn in #engineering. #Bicycle #train
  #suspension

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