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【多选题】
内拉线抱杆与外拉线抱杆组立铁塔相比较，不同的有（ ）。A.
内拉线抱杆的拉线是分别固定在铁塔四根主，不受铁塔周围地形的影响，同时也减少了因埋设拉线地锚所需要的工作量。
B.
内拉线抱杆由于顶部装有双轮朝天滑轮，同时又可以进行双吊，加快了施工进度，提高了施工效率
C.
内拉线抱杆一般都为钢管制成，重量比木质抱杆轻，其头尾部件和抱杆本身可以分解，所以搬运比较方便，升落抱杆也很容易。
D.
内拉线抱杆也存在着不够理想之处，在抱杆升落时，由于塔身内部绳索较多，操作起来有些不太方便。
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