free-piston engine

type of engine with no crank

en-US/ˈfɹi - ˈpɪstən ˈɪnd͡ʒən/
en-GB/ˈfɹiː - ˈpɪstən ˈɛnd͡ʒɪn/

ক্যাটাগরি:

internal combustion engine