About: http://webisa.webdatacommons.org/51658361

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Therefore, the deterioration of the seals is a serious problem.Among seals, a sealing material used in a static sealed portion of a vacuum chamber, etc. is fitted in a seal groove formed in a wall surface of a metal or the like.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com