A fuel cell module has a hydrogen recirculation pump and a controller. Between the two body portions is an actuator having two sides. Identification of a first group of the nodes to form the lock group is received. Due to the gradual decrease in the modulus of elasticity of the inventive mesh implant, the regenerating tissue may gradually take over the load applied to the tissue defect area. The billing device may issue an authorizing token to approve a buyer purchase order and to assure the seller that the buyer account is sufficient to cover prospective purchases. Regardless of form the brackets have reversely bent edge flanges so that they may be linked together to form parallel chains.