| 摘要 |
A line-handling block particularly for sailing vessels has an attachment means (30) rotatably mounted in the body. Locking means (50) are slidable in keyhole slots (60) into or out of engagement with the attachment means (30). When in engagement the locking means (50) may permit only limited rotation of the attachment means to either side of a central position. They may yield if an excessive torsional load is experienced, and may be supplied in various interchangeable forms for fitting to a given block so that its characteristics may be adjusted.
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