Abstract: A laser automatic compensation control device includes a controller, a digital array, a decoder, a compensation array and a synchronizer. The controller is configured for receiving a number of laser energy signals and comparing each laser energy signal with a corresponding preset energy value to obtain a corresponding output digital signal. The digital array is electrically connected to the controller and configured for storing the output digital signals. The decoder is electrically connected to the digital array and configured for converting the output digital signals into a number of analog compensation signals. The compensation array is electrically connected to the decoder and configured for storing the analog compensation signals. The synchronizer is electrically connected to the compensation array and configured for receiving the analog compensation signals, and synchronously outputting the analog compensation signals to a laser diode array.

Abstract: Described herein is a foldable table capable of being expanded and stably folded. The foldable table includes a table top plate; two matching frames, each including a first frame and a second frame; and two foldable table legs, each including a first support member and a second support member. Each of the first support member and the second support member includes a U-shaped bolt and a spring drum for combining with the two support members. The support member design including the U-shaped bolt and the spring drum allow the foldable table to be expanded without using excessive force. The table top plate includes a first plate body and a second plate body, each of which includes a joint portion, which allows the table to be stably folded.

Abstract: Described herein is a foldable table capable of being expanded and stably folded. The foldable table includes a table top plate; two matching frames, each including a first frame and a second frame; and two foldable table legs, each including a first support member and a second support member. Each of the first support member and the second support member includes a U-shaped bolt and a spring drum for combining with the two support members. The support member design including the U-shaped bolt and the spring drum allow the foldable table to be expanded without using excessive force. The table top plate includes a first plate body and a second plate body, each of which includes a joint portion, which allows the table to be stably folded.

Abstract: A simple color distinguishing card set is composed of certain mixed color cards and a primary color arrangement card. Each of these mixed color cards is provided with a primary color spot, a plurality of mixed color spots, and a plurality of transparent spots groups or holes groups. The primary color card is provided with a plurality of primary color congregation areas. A specific mixed color may be easily found by means of packing together some or all of these mixed color cards. Reversely, specific primary colors may be obtained by means of placing the respective mixed color card over the primary color arrangement card.