{
  "$type": "site.standard.document",
  "description": "An example liner assembly (22) includes a backing plate that supports a cellular structure (26) covered by a perforated face sheet (28) including a plurality of openings (32). The surface of the face sheet (28) includes a surface finish no greater than an equivalent sand-grain roughness of 0.0003…",
  "path": "/patents/999273",
  "publishedAt": "2012-08-22T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02C7/045",
    "UNITED TECHNOLOGIES CORP [US]"
  ],
  "textContent": "An example liner assembly (22) includes a backing plate that supports a cellular structure (26) covered by a perforated face sheet (28) including a plurality of openings (32). The surface of the face sheet (28) includes a surface finish no greater than an equivalent sand-grain roughness of 0.0003 inches.",
  "title": "Micro-perforated acoustic liner"
}