Highly purified Stevioside, Rebaudioside A and a purified sweet steviol glycoside mixture were prepared from sweet glycoside extracts obtained from Stevia rebaudiana Bertoni leaves. The radar detecting unit includes a horn antenna, a signal processing unit for detecting signals received by the horn antenna, a laser module for receiving laser signals, a central processing unit for controlling the detection of the signals, a visual display means for visually displaying the detected signals, and a voice producing means for outputting the detected signals to a speaker. 06, where fm is the focal length of the scanning optical system in the main scanning cross section, and d1 is the central thickness of the first scanning lens, and a second scanning lens is such that. A light receiving part is supported on the light output part, and receives the scanning beam reflected by the reflection mirror. In one embodiment of the invention, a portion of the body of the first element may be destroyed while moving the teeth from the locked position to the unlocked position. The cardboard plate of the front side and the cardboard plate of the reverse side respectively incorporate slots, that describe a trajectory with the shape of an \u201cL\u201d, or any other appropriate trajectory.