Development of a balloon-style pressure vessel gondola for balloon-borne emulsion gamma-ray telescopes. (12th September 2019) - Rokujo, H.; Komiyama, M.; Aoki, S.; Hamada, K.; Hara, T.; Iyono, A.; Kawahara, H.; Kodama, K.; Komatani, R.; Komatsu, M.; Kuretsubo, K.; Marushima, T.; et al.