장난감 자동 진공 청소기
Gelsonlab HSTM-066 Education Science 장난감 자동 진공 청소기t
Through the transmission of gear set and the ingenious combination of movable baffle in time, 장난감 자동 진공 청소기 can realize obstacle avoidance, turning, dust collection and other actions, and realize mechanical automation. The structure, principle and application of vacuum cleaner are understood through experiments.