| 摘要 |
The transmission from the exit shaft (10a) of a motor (11) has a threaded rod (1a) fixed to a small tube (2). A nut (4) is screwed on the rod with washers (5,6) and a tube (9) that hold a bent rod (7) which transmits the movement to the mobile elements. The motor is joined to a base plate and a hidden column is fixed to the centre of this and to a fixed base (19). A bearing (23) supports a column, round the hidden column, to which the mobile elements are fixed.
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