Lid administrative use display of underground structure

摘要

(57) Abstract Objective While the lid is closed to be able install, the coverIn the body like the perforation hole special structure is not provided, the te installationWhen and others the re, being necessary to install, nothing works,te offer of lid administrative use display of good underground structure. Constitution Installation the crevice which is provided on the surface of lid 10The external form and the crevice which section it makes 11 and 12, in the crevice the Inlaying ball are packedTo possess the thickness which is settled in, on the surface indicatory means 23ProvidingIs indicatory piece 21 and 22 is adhered to the above-mentioned crevice.