| 摘要 |
There is described a tugboat (1) having three azimuthal propelling units (10, 20, 30), two (10, 20) of which are juxtaposed below the stem (7), symmetrically relative to the main plane of symmetry (2), while the third azimuthal propelling unit (30) is disposed in the main plane of symmetry (2) below the stern (6), preferably before the rearmost towing point (8).
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