EXPANSION EXCAVATION DEVICE AND EXPANSION EXCAVATION METHOD
TANI KIYOAKI, YAHATA KENICHI, MARUI TETSUTO, SAKAMOTO MASATOSHI, MAENISHI MASANORI, SAITO MAMORU, MIYAMOTO KAZUYUKI, SATO HIDETO
Year of Publication 29.03.2022
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Year of Publication 29.03.2022
Patent