A fluid connection comprised of a first fitting having a body with a first end and a second end. Thus, the dust suction performance of the electric vacuum cleaner is enhanced and the usage time of a battery per charge is lengthened. The inside diameter of the female part, increased by the depth of the screw thread, is greater than the outside diameter of the male part. The insulation layer is on a through-hole of the semiconductor chip and has an opening which exposes the internal circuit pattern which was exposed by the through-hole. , words and abbreviations, to be converted to the spoken content, as well as substitution tokens that are selected from contextual repositories based on the context identified by the contextual conversion platform.