礦用(yong)U型(xing)鋼(gang)支架(jia)(jia)U型(xing)鋼(gang)支架(jia)(jia)規格:礦用(yong)U型(xing)鋼(gang)支架(jia)(jia),U型(xing)鋼(gang)支架(jia)(jia),25U型(xing)鋼(gang)支架(jia)(jia),29U型(xing)鋼(gang)支架(jia)(jia),36U型(xing)鋼(gang)支架(jia)(jia),礦用(yong)支撐鋼(gang);主(zhu)要(yao)用(yong)于礦井(jing)巷道、礦井(jing)斜(xie)巷、礦井(jing)平硐支護等;