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用途:適用于平行四邊形法、異長法觀測弛度,可將經緯儀固定于鐵塔角鋼上。
uses:to observe the sagging by means of the parallelogram method and different length method .can mount the theodolite on the pylon
放大倍數 (magnification factor):4
適用角鐵(applicable angle iron):∠56~125
重量(weight(kg)):1.6
馳度儀自帶鐵塔固定架,可配鋼桿固定架