A bicycle spoke fixture assembly is provided. The system includes: an automated device for delivering a prescribed unit dose of medication to a drug product container from a drug container. The apparatus comprises a gas analyzer to generate a first signal indicative of a density of the precursor in the process gas and a controller. The transmission apparatus and method according to the present invention allow for secure communication between terminals without server intervention by encrypting data using an ID-based encryption technique for safe data communication and then communicating the encrypted data. This arrangement makes it possible to realize an increased space between the micro mirror and the substrate, thereby realizing an enlarged mirror tilt angel, without increasing the thickness of the sacrifice layer.