以下为句子列表：
英文: The paper mainly introluces the stretching method for tendon, reasons for retraction of male cone, the influence of male cone retraction on prestress value, and measures adopt in dealing with extra loss of prestress.
中文: 介绍预应力筋张拉方法、锚塞回缩产生的原因、锚塞回缩对预应力值的影响程度以及其对预应力值过大损失的处理方法和措施。
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