A system for conversion or amplification using quasi-phase matched four-wave-mixing includes a first radiation source for providing a pump radiation beam, a second radiation source for providing a signal radiation beam, and a bent structure for receiving the pump radiation beam and the signal radiation beam. The sensor interface of the connection module is made as a parallel interface. The gas suppression additives are preferably based on unsaturated hydrocarbons. The present invention also provides recombinant polynucleotides, vectors, host cells, and kits for producing the subject antigen-binding units. The layered structure formed by laminating the TPU film and the nonwoven fabric sheet is of a reduced extendibility and increased tensile strength due to the inherent excellent tensile strength of the nonwoven fabric. It comprises the steps of: a first slave asking role exchange and transmitting a FHS packet to a first master at a first time point t1; the first master exchanging as a second slave at the second time point t2; the first slave re-transmitting a plurality of FHS packet; and the first slave exchanging as a second master automatically.