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| 火花点火式エンジン River and Water Resources Glossary (Infrastructure Development Institute Japan) ; 火花点火機関 Engineering and Science Technical Dictionary (James Friend) | |||
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| 火花点火機関 River and Water Resources Glossary (Infrastructure Development Institute Japan) | |||
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| 火花点火式エンジン River and Water Resources Glossary (Infrastructure Development Institute Japan) ; 火花点火機関 Engineering and Science Technical Dictionary (James Friend) | |||
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| 火花点火機関 River and Water Resources Glossary (Infrastructure Development Institute Japan) | |||
