A lowerator for an assembly system of the type including at least one rail defining a path of travel with respect to at least one workstation, and a conveyor for transporting a workpiece along the rail. The PCB comprises a body having at least one signal trace, a hearing aid compatibility coil located in the body and electrically coupled to the at least one signal trace, and a ferrite core located in the body for amplifying a magnetic field generated by the HAC coil. The first transmittingreceiving section and the second transmittingreceiving section are isolated from each other physically. Therefore, the present composition for photodynamic therapy of cancers is also very useful in detecting cancers. Super heated exhaust gas flows through first opening and third exchanger. There they are fixed be means of sliders and are then back molded with a thermoplastic material.