help, 句子分析
Wandering tradespeople began to /spin glass fibers at fairs, making
decorations and ornaments as novelties for collectors, but this material was of little
practical use; the fibers were brittle, ragged, and no longer than ten feet, the circumference
of the largest reels.
这句子怎么分析？怎样翻译？主要是最后那句and no longer than ten feet, the circumference
of the largest reels让我不知所措。
