A data transmitting method in a thin client network system including a thin client, and a server connected to the thin client through a network. According to the invention, a thrust collar that is connected to the planet carrier plate in one piece is provided between the planetary gear and the planet carrier plate of the planet carrier. In particular the method provides a way for hermetically sealing cavities under controlled atmosphere and pressure in the encapsulation and sealing processes of cavities comprising fragile content. Each trunk line is set with a wavelength division multiplexing device and it can only pass the uplink and downlink signals of the connected interface circuits.