A portable buffet style serving and seating table comprising a table body box with one or more hollow compartments for placing food containers. The mixed, single stream is then passed into and through a shear mixing zone and then into a lower pressure expansion zone, in which atomization occurs to form a spray of atomized drops of the liquid. The vortex flow means is a vortex flow generator groove provided on an upper face of the metering plate and connected with a wall face of an entrance of the nozzle hole, and a main stream of fuel flowing in the groove is directed to a position shifted from the center of the nozzle hole. If the verification is successful, the server transmits presentation information of the users for the conference received from the HMDs and the compact cameras to the HMDs. The reflective display is configured to reflect the chrominance component.