A remote control comprises a button generating control signals; a transmission unit configured to transmit the control signals to an electronic reader; a microprocessor unit configured to analyze an operation type according to the control signals and generate operation signals corresponding to the operation type to signal the electronic reader to flip page. In particular, a block object, representing a component of the digital logic circuit, is instantiated. The tubing hanger has an opening therethrough which includes a lateral portion connecting with its outer diameter and a vertical portion leading to a pressure responsive operator for a tubing safety valve. The wrapper specially processes information in a corresponding agent system. Successive layers of photosensitive material and sacrificial material may be added until a final, complex three-dimensional structure is created. The plunger member has a second distal end portion configured to slide within the case member.