The system comprises an ion generation device and an electric control panel which is used for controlling the ion generation device, and the system also comprises a selection switch, wherein the ion generation device comprises a plurality of pairs of positive and negative ion output ends; and the selection switch is used for controlling the turning on and off of some positive and negative ion output ends.
什 么, 我 不明白... 和 我 有 什 么? 关系-??? 没 有??,, 前言 不 搭 后? 语patents-wipo patents-wipo