pit prop

同根派生

英汉例句

• A fork waveguide model is proposed and the mode matching and multi-mode network technique are used to analyze the transmission characteristics of rectangular tunnel with metallic pit prop.
  针对矩形巷道中由于金属支护立柱的存在而带来的分叉不连续问题,提出用分叉波导模型并用模式匹配法和多模传输理论分析传输特性。
• a pit prop(= one used in a coal mine)
  煤矿坑木
• The conservation of pit prop at ancient copper mine
  古铜矿遗址地表坑木的保护
• The timber is used for construction, poles, vehicles, pit props, railway sleepers, and wood fiber.
  木材用于建设，杆，车辆，具洼点的支柱，铁路睡眠者和木头纤维。
• Effect of Metallic Pit Prop on Transmission Characteristics in Tunnel
  金属支护立柱对巷道无线传输特性的影响