Jisho

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圧縮開放
Wikipedia definition
1. Compression release engine brakeA compression release engine brake, frequently called a Jake brake or Jacobs brake, is an engine braking mechanism installed on some diesel engines. When activated, it opens exhaust valves in the cylinders after the compression cycle, releasing the compressed air trapped in the cylinders, and slowing the vehicle.
Read “Compression release engine brake” on English Wikipedia
Read “圧縮開放ブレーキ” on Japanese Wikipedia
Read “Compression release engine brake” on DBpedia

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