mast derrick

常見例句

雙語例句

• Do not throw objects off the floor, mast or derrick.
  不允許從鉆臺(tái)上或井架上，往下亂扔?xùn)|西。
  blog.sina.com.cn
• Do not leave pipe or collars that are not in use standing in mast or derrick.
  不許在井架上排放用不著的鉆桿和鉆鋌。
  blog.sina.com.cn
• The frame of mast derrick that is designed for hydraulic wheel tractor hoist adopt welding of armor plate, its section is oblong armor plate, and its material is HG60.
  為滿足液壓輪式通井機(jī)的使用要求而設(shè)計(jì)的桅桿式井架采用板焊結(jié)構(gòu)， 主體截面為長方形的方形鋼， 材料為HG60。
返回 mast derrick