Thorax. 2.5.1. The thorax is shown as part No. 5 in figure l of this annex. 2.5.2. The thorax consists of a rigid thoracic spine box and three identical rib modules. 2.5.3. The thoracic spine box (part No. 5a) is made of steel. On the rear surface a lead-filled plastic back plate is mounted (part No. 5b). 2.5.4. The top surface of the thoracic spine box is inclined 5 degrees backwards. 2.5.5. A rib module (part No. 5c) consists of a steel rib covered by a flesh-simulating polyurethane foam (part No. 5d), a piston-cylinder assembly (part No. 5e) linking the rib and spine box together, a hydraulic damper (part No. 5f) and a stiff damper spring (part No. 5g). 2.5.6. In the piston-cylinder assembly is a tuning spring (part No. 5h). 2.5.7. A displacement transducer (part No. 5i) can be mounted on the front face of the cylinder and connected to the inside of the rib.
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Sources: Agreement Concerning the Adoption of Uniform Conditions of Approval and Reciprocal Recognition of Approval for Motor Vehicle Equipment and Parts, Agreement Concerning the Adoption of Uniform Conditions of Approval and Reciprocal Recognition of Approval for Motor Vehicle Equipment and Parts