67. Fastening to shears.
68. Square mooring. When the cable is round the post, A, and the
piece, c, without being crossed, it lays in the section 1, 2, 3, 4, 5,
6, 7, and the end is fastened by tying.
Scientific American, Volume XXIV., No. 12, March 18, 1871 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures. · 第 51 / 194 题