I consider these stoves to be engineering marvels! I have never found much detailed information in English. One of the best overviews I have found is this video

I consider these stoves to be engineering marvels! I have never found much detailed information in English. One of the best overviews I have found is this video: https://youtu.be/r_TO30jzyUA https://youtu.be/r_TO30jzyUA