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紧线器，又叫棘轮收紧器，是在架空线路敷设施工中作为拉紧导线用的。
使用时先把紧线器上的钢丝绳或镀锌铁线松开，并固定在横担上，
用夹线钳夹住导线，然后扳动专用板手。由于棘爪的防逆转作用，
逐渐把钢丝绳或镀锌铁线绕在棘轮滚筒上，使导线收紧。把收紧的导线固定在绝缘子上。
然后先松开棘爪，使钢丝绳或镀锌铁线松开，再松开夹线钳，
最后把钢丝绳或镀锌铁线绕在棘轮的滚筒上。

紧线器应用领域:

建筑、公路、桥梁、冶金、矿山、边坡隧道、井道治理防护等基础建设工程的机械设备。

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