chocking

• Mountaineering equipment - chocks - safety requirements and test methods
  登山设备.轮挡.安全要求和试验方法
• Mountaineering equipment . chocks . safety requirements and test methods
  登山设备.导缆索.安全要求和试验方法
• The entrance was chocked up with cinders , and we had difficulty getting in
  进口处堆满了煤渣，我们难以进入。
• Practice and application of the four chock method in mine extension survey
  四架法在矿井延伸测量中的实践与应用
• Wzb non - chock thick liquid pump
  Wzb型无阻塞浆泵
• Automatic chock cover setting
  自动阻风门盖调到
• Chocks , ship mooring , cast steel
  铸钢船锚塞块
• Railway transport equipment . general tackle . chocks for barrels and vehicles
  铁路运输设备.一般用具.桶和车辆用楔形垫块
• Practice for installation procedures for fitting chocks to marine machinery foundations
  船用机械基座固定楔安装程序惯例
• Chock for towing block
  曳纲束钻用导索器