sentence1: the above construction is called in what follows an annulus rim-surgery , since it looks like the rim-surgery of fintushel and stern , except that we tie two strands simultaneously , rather then one .
sentence2: knotting of a band b kthe above construction is called in what follows an annulus rim-surgery , since it looks like the rim-surgery of fintushel and stern , except that we tie two knits together instead of one .