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The size and characteristics of desktop platform design models in this series of similar function in driving operation can bear large axial load and radial pressure at the output end is provided with a convex fixed disk and large diameter hollow shaft, can set the collocation of dynamic and static automatic peripheral equipment, the power source for electricity, oil and gas pipe is arranged in the through hole. The biggest thing about this kind of machine is that it is more compact and thinner in appearance, and is applied to the highly restricted automation of space.