Assembly method using marked information and assembly assembled by said assembling method

A method for assembling a cell structure in a metal vessel, comprising:

• providing a compressible material having a cushioning property wherein information regarding the thickness and/or bulk density of said compressible material is recorded as indicia located on a surface of said compressible material;
• reading said information and selecting a cell structure, a metal vessel, and a compressible material which, when assembled as a cell structure housed in a metal vessel, have a specified holding condition based on the read information;
• assembling said selected cell structure in said selected metal vessel via said selected compressible material, said compressible material being located in a compressed state between an outer periphery of said cell structure and said metal vessel;
• and
• applying, after assembling said selected cell structure in said selected vessel, a mounting pressure to said selected cell structure via said selected compressible material to hold said selected cell structure in said selected metal vessel.