| 摘要 |
<p>The device has a symmetrical spi (S) comprising an attachment point (A) and a first passerby (B) in a top part, a second passerby (K) in a middle part and a third passerby (D) in a bottom part. A smothering end piece (C) includes an end (A') fixed to the attachment point and a stop (E) in a determined position, where the end piece passes successively into the second passerby and the third passerby. The end piece passes into the first passerby and includes sufficient length to return to rear portion of a sailing ship by an appropriate unit.</p> |
