1.绳子拉在上面, 2.绳子的着力点和榫头有两寸的的距离.
再补充一点, 凳面(悬梁)有一定的斜度, 斜度越大, 绳子的作用就越大.
1.绳子拉在上面, 2.绳子的着力点和榫头有两寸的的距离.
再补充一点, 凳面(悬梁)有一定的斜度, 斜度越大, 绳子的作用就越大.
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