A multi lumen endotracheal tube having a balloon cuff to seal a patient’s trachea during intubation. Analyses are performed, comparing metadata, tags, and similarity of images, to determine trends and similarity. The input register stores coefficients of terms on respective orders of a generator polynomial. ; R3 to R7, which may be identical to or different from each other, represent a hydrogen atom, a linear or branched alkyl group having 1 to 10 carbon atoms which may have a substituent, a linear or branched alkyloxy group having 1 to 20 carbon atoms which may have a substituent, etc. The weld ring is securely joined to the threaded nutplate by co-molding and is securely joined to the shell by a spin weld process. The burner comprises at least one fire pipe inside the solid fuel space, through the wall of which a possibility for gas flow is arranged.