作者: Mitsuru Kogami
DOI:
关键词: Front (military) 、 Closing (real estate) 、 Closed position 、 Geology 、 Structural engineering
摘要: A lid body is constituted so as to enable selectively take a closing preparation position wherein the moved forward housing frontward side with an approximately horizontal condition and projects front, closed opening portion of vertical condition, open backward condition.