four-stroke engine

internal combustion engine type

en-US/ˈfɔɹ - ˈstɹoʊk ˈɪnd͡ʒən/
en-GB/ˈfɔː - ˈstɹəʊk ˈɛnd͡ʒɪn/

カテゴリ：

reciprocating engine