On global building sewer uses cupreous conduit is development trend.在全球建筑上下水道用铜水管是发展趋势.Using EDTA dispart ray luminosity method test cupreous in gold - cupreous - cadmium liquid.采用EDTA分光光度法测定金 - 铜 - 镉镀液中的铜.Whorl copper c...
Estimate , debar and repair the failure of network and computers.网络系统、计算机硬件的故障判断、排除和送修.The railroad gates debar people from crossing the tracks.铁道的栅栏阻止行人跨越轨道....