| 摘要 |
Support module characterised in that a connection bar 37 is supported under the base 1 so as to be able, on the one hand, to pivot about its horizontal axis thus allowing the wheels to be raised from the position 40a to the position 40b and, on the other hand, to be directed in a horizontal plane by rotating about a vertical pivot 35 in order to steer the module over sloping ground. <IMAGE>
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