drill-bar的意思|示意
[油气] 钻杆
drill-bar的网络常见释义
钻杆 ... drill钻头 drill-bar钻杆 drill-harrow除草小耙 ...
drill-bar相关短语
1、 drill bar 钻杆
2、 bar drill 杆钻 ; 架式凿岩机
3、 drill-bar r 钻杆
drill-bar相关例句
Based on introducing the working principles of the metal bar code, a method to manage drill string by planting metal bar code into the connection was developed.
结合柳湾煤矿开拓巷道 ，顺槽和综采工作面切割巷 ，采用锚网支护试验对金属网的作用机理进行重点研究。
Main products include ductile manhole covers, composite resin covers, drill rod cement covers, galvanized steel grating, polymer alloy covers, cast iron manhole covers, flower bar, cast iron pipe.
主营产品有球墨井盖、复合树脂井盖、钢钎水泥井盖、镀锌钢格板、合金高分子井盖、球墨铸铁井盖、铸铁井盖、花栏、铸铁管等。