Abstract: A safety power strip includes a power strip base and a control system. The power strip base has plural receptacle outlets connected with power terminals, and a power line jointed with plugs for connecting with power source. The control system is provided with thermal sensors to detect temperature change occurred in the power strip base and enable a speaker to sound out for warning in case of detecting unusual temperature changes.

Abstract: A cleaning device for internal combustion engine by way of suction force generated at the air-inlet tube of the engine is disclosed. The tapered air passage accelerates the air stream to produce a suction force, or a moveable or adjustable valve device to change the surface area of the air passage so as to control the effect of vacuum, and the cleaning solution is sucked into the air-inlet tube to clean away the accumulated carbon and debris in the valves or the internal combustion engine.

Abstract: A cleaning device for internal combustion engine by way of suction force generated at the air-inlet tube of the engine is disclosed. The tapered air passage accelerates the air stream to produce a suction force, or a moveable or adjustable valve device to change the surface area of the air passage so as to control the effect of vacuum, and the cleaning solution is sucked into the air-inlet tube to clean away the accumulated carbon and debris in the valves or the internal combustion engine.