礦用(yong)U型鋼(gang)支架U型鋼(gang)支架規格:礦用(yong)U型鋼(gang)支架,U型鋼(gang)支架,25U型鋼(gang)支架,29U型鋼(gang)支架,36U型鋼(gang)支架,礦用(yong)支撐鋼(gang);主要用(yong)于礦井(jing)巷道、礦井(jing)斜巷、礦井(jing)平(ping)硐支護(hu)等;