| CPC B60L 53/30 (2019.02) [A01D 34/008 (2013.01); B60L 53/16 (2019.02)] | 18 Claims |

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1. A stationary device, comprising:
a first base;
a second base detachably connectable to the first base; and
a stationary device control assembly;
wherein the second base comprises a housing including an inner cavity;
wherein the stationary device control assembly is accommodated in the inner cavity and is enclosed by the housing;
wherein, in a first state, the first base is fixed on a working surface and the second base is connected to the first base; and
wherein, in a second state, the first base is fixed on the working surface and the second base is separated from the first base.
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