A disc drive apparatus has a fixed unit and a collapsible unit which is supported to be expansible and contractible to the fixed unit. The product feed tube of the spray gun is inserted into the cleaning fluid container, which is then sealably clamped to the spray cap of the spray gun. In one embodiment, coaxial design is provided. Additionally, the design structure includes a top-side interconnect of the through-silicon via bandpass filter on a surface of the dielectric layer and a plurality of contacts in the dielectric layer in contact with the top-side interconnect. Points around the location can be identified based on having associated hash values that fall within the identification boundary.