Now I am going to pull on here and I'm going to increase the tension on the bottom one until one of the two breaks.
如果我像这样给它一个拉力，持续增大二号绳上的张力，直到两绳中的一根断裂。
And each time you pull her in, it releases that tension.
然后，你每次把她拉回来，张力就松弛下来。
Secondly, in order to realize the invariable tension control of high speed casting machine, the pull and wind-up tension of high speed casting machine have been researched.
其次，为了实现高速流涎机组恒张力控制，对其拉伸和收卷张力进行了研究。
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