18.Either party may demonstrate its execution or acceptance of this Agreement by facsimile transmitted via telecopier showing the transmitting parties' signature thereon.
19.Dual Manchester code communication technology is mainly used to get rid of the interference caused by the two Manchester codes transmiting in one hepta cable.
20.Besides,the quantity in the certificates must totally according to the transmitted sheet,inconsistent status will be analysed with the hindward reports and described the disposal ways.