

用于连接钢丝绳或导线时, 能让通过张力设备上的牵引滑轮。
可将经纬仪固定于铁塔角钢上。uses:to observe the sagging by means of the parallelogram method and different length method .can mount the theodolite on the pylon
□ 放大倍数 magnification factor:4
□ 适用角铁applicable angle iron:∠56~125
□ 重量weight(kg):1.6