Abstract: A manufacturing method for a LED is disclosed. The method includes: providing a substrate with an upper surface; preparing a plurality of LEDs on the upper surface; wherein the upper surface is divided into a plurality of zones, the plurality of LEDs composes a plurality of LED groups, and each of the LED group is disposed in one of the plurality of zones; preparing a testing circuit to electrically connecting the plurality of LEDs in one of the plurality of LED groups; testing the plurality of LEDs in the one of the plurality of LED groups by the testing circuit to obtain photoelectrical characteristics of the plurality of LEDs in the one of the plurality of LED groups; and presenting the photoelectric characteristics in an image.

Abstract: A lubrication apparatus for an engine includes a crankshaft chamber, a camshaft chamber, and an oil reservoir chamber, wherein an oil-suction piping path is provided in the oil reservoir chamber, and is communicated between the crankshaft chamber and the oil reservoir chamber. The oil-suction piping path includes, among others, a rotatable pipe including a plurality of oil-suction orifices located at wall of the rotatable pipe. No matter the engine is situated at any state of declination, at least one of the oil-suction orifices and an air-suction vent is kept under the surface of the lubricant, so that the engine can be appropriately lubricated. Further, a one-way valve is arranged between the crankshaft chamber and the oil reservoir chamber, where most of the lubricant can flow back to the oil reservoir chamber during the descending stroke of a piston, so that a lubricant supply can be reduced.