To provide a method of manufacturing a quartz-crystal resonator, in which without adding new processes, a desired quartz-crystal piece can be obtained from a quartz-crystal wafer by etching and electrodes can be provided without restraint. The system has plasmonic nanostructures integrated to both a photoanode and a photocathode for enhancing respective electron and hole carrier transfer. Also, on receiving through the fiber-optic cable a signal that is an instruction to write data into the RF tag and a signal indicating the write data, the readerwriter writes the write instruction and the write data into the RF tag through radio communication. In order to be fixable to the fluid storage bag in a safe and easy manner, said port device further comprises at least one bridge element supporting said sidewalls and oriented transversely to the longitudinal direction. The flow control modules may be implemented within a sender andor receiver or may be deployed into a network as a separate device without requiring significant additional resources. Specifically, the present invention provides a visual golf club-head curvilinear path guide in the form of one or more alignment lines or markings on putters and other club-heads that are curvilinear and that curve toward the golfer’s body as he or she stands at address.