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- 石油钻杆用G105级钢grade G105 steel for oil drill pipe
- 石油钻杆接头螺纹的数控修复加工方法Renovation of Threads on Rotary Shouldered Connections for Petroleum Ind ustry by NC Machining
- 转炉试制超低硫低磷钻杆用钢的研究Research on Ultra-low Sulfur and Phosphorus Steel for Drill Pipes Trial-produced with a Converter
- 石油钻杆接头螺纹的数控修复加工系统A NC Repair Machining System of Threads on Rotary Shouldered Connections for Petroleum Industry
- 石油钻杆热处理监控系统的研究与应用Research and Application on the Heat Treatment Supervising Control System of Petrolic Drill Pipe
- 非调质D级抽油杆用钢as-rolled and tempered steel for D-level sucker rod
- 第一级first step
- "... 我要用利剑一样的话刺痛她的心，但决不是真用利剑 ... ""... I will speak daggers to her, but use none ... " (Shakespeare, Hamlet)
- 石油钻杆drill pipe
- "Harmsworth先生，" 我用微弱的声音说。 "别打断我的说。" 他说。"Mr Harmsworth, " I said in a weak voice, "Don't interrupt, " he said.
- 打包带钢baling strip
- "洋葱皮" 级onion skin level
- "爸，今晚我用一下车子，" 他说。 "除非我死了！" 他父亲答道。"I'm going to take the car tonight, Dad, " he said. "Over my dead body!" his father answered.
- 在把钻杆插入井下的过程中，他们意外地发现了一种稀有矿物的矿床。In course of sinking the well-shaft they came upon a deposit of a very rare mineral.
- 他用一条湿毯将火焰闷熄。He smothered the flame with a wet blanket.
- 低合金高强度钢Cor-Ten
- 林级stand class
- 过级college English level test
- ＂他多次尝试打开车门，但都不得要领，因为他用错了钥匙。＂"All his attempts to unlock the car were futile, because he was using the wrong key."
- 登梯须从第一级开始。He that climb a ladder must begin at the first step.
