牛宝

maoganshitianrandetucengbianbizhongzuankong、fangrushoulaganjian、guanjiangmaoguxingcheng。dangranbianbishangmaogandejiemianmianjihecengshu，jianju，zhangdudengjingguojisuanlaiquedingde。

左旋锚杆钢就是一种矿用支护材料，用作国定在岩层的锚杆里加固和支护围岩的一种支护形式。在岩土体中安装锚杆，是岩土体受到补强的作用，防止松动的岩石塌落，保护洞室稳定的支护方法。目前广泛的应用于矿上巷道和交通隧道灯建筑物加强施工领域的地方。

maoganzhihujishushitongguoyuyinglimaosuojiaguyanti，qishijiushitongguomaosuoduijiagudeyantishijiayuyingli，xianzhiyantiyouhaibianxingdefazhan，keyimingxiandegaishanweiyandeyinglizhuangtai，**weiyandezichengnengli，congerbaochiweiyandewending，maosuozhihujishushiduimaoganzhihujishudefazhan。maoganjiangxiangdaomaoshuanjijin，duiyanshishijiayuyingli，yipinghengyanshineisuochanshengdezhanglali，zuzhiliexidejixukuoda，erqieduiyusongsanyanshiyenengqidaojiyalianjiezuoyong。