1) 电缆支架最上层至竖井顶部或楼板的距离为______________m; 1)Distance from the upmost of support to the top of vertical shaft or floor slab is ___m; 2)电缆支架最下层至沟底或地面的距离为_____________m; 2)Distance from the undermost of support to ditch bottom or ground is _______m; 3)电缆支架层间最小距离为_________m; 3)The min. distance between layers of cable support __________m。
chen_huicong LV2
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