LOCKING DEVICE FOR COVER OF ENTRANCE FOR COMMON CONDUIT, ETC

• Main Author: MIZUGUCHI KEIICHI
• Format: Patent
• Language: English
• Published: 27.07.1999
• Edition: 6
• Subjects: EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; SOIL SHIFTING; UNDERGROUND OR UNDERWATER STRUCTURES

PROBLEM TO BE SOLVED: To provide a locking device for a cover of an entrance for a common conduit, etc., which is not brought to the state, in which the locking device cannot be released by the intrusion of a foreign matter, and a released state can be confirmed at a glance and which is also release...