A linear compressor having a dynamic vibration-reducing unit, which is provided at a stopper, by which separation of a cylinder block is prevented, for eliminating vibration generated from a hermetically sealed container at a specific frequency band. The invention further relates to a method of generating such transgenic plants and methods for enhancing the level of expression of a selected heterologous protein in seeds of such transgenic plants. The present invention can be applied to a photo sticker creating device, for example. The FIFO has a data bus input for coupling to a data output, for example from an analog transceiver.