短语词组短語continuous property of bave 繭絲纖度連續性vulnerable bave spot 繭絲薄弱環節bave total length 繭絲縂長度bave cocoon silk 繭絲Abnormal bave gumming 繭絲異常膠著bave reelable length 繭絲可繅長度 返回 bave