The structure of the radder

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PROBLEM TO BE SOLVED : slidably by utilizing the pivoting block, radder becomes stable development for, use with improved safety, moreover, since the width is substantially reduced, thereby improving the structure of the housing to provide a ladder. SOLUTION : inverted squarish U shape body, in the center, in the lateral direction, at regular intervals, is provided with a front support rod 11 and a front frame 1, two corresponding to shapes and, in between, in the lateral direction, at an equal interval, and a supporting rod immunocytostaining provided from, one end thereof, and is coupled to the front frame 1 rare frame 2. Furthermore, in the center, in the lateral direction, at regular intervals, is provided with a central supporting rod 31, the slide can be displaced vertically, and a supporting rod immunocytostaining rare frame 2, pivotally attached by a block, and the central frame 3, a front frame 1 and a front supporting bar 11, and in which the support rod immunocytostaining rare frame 2 provided so as to straddle the, surface, at equal wave pattern is formed. Selected drawing : fig. 4