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- 石油鉆桿用G105級鋼grade G105 steel for oil drill pipe
- 石油鉆桿接頭螺紋的數控修復加工方法Renovation of Threads on Rotary Shouldered Connections for Petroleum Ind ustry by NC Machining
- 轉爐試制超低硫低磷鉆桿用鋼的研究Research on Ultra-low Sulfur and Phosphorus Steel for Drill Pipes Trial-produced with a Converter
- 石油鉆桿接頭螺紋的數控修復加工系統A NC Repair Machining System of Threads on Rotary Shouldered Connections for Petroleum Industry
- 石油鉆桿熱處理監控系統的研究與應用Research and Application on the Heat Treatment Supervising Control System of Petrolic Drill Pipe
- 非調質(zhì)D級抽油桿用鋼as-rolled and tempered steel for D-level sucker rod
- 第一級first step
- "... 我要用利劍一樣的話(huà)刺痛她的心，但決不是真用利劍 ... ""... I will speak daggers to her, but use none ... " (Shakespeare, Hamlet)
- 石油鉆桿drill pipe
- "Harmsworth先生，" 我用微弱的聲音說(shuō)。 "別打斷我的說(shuō)。" 他說(shuō)。"Mr Harmsworth, " I said in a weak voice, "Don't interrupt, " he said.
- 打包帶鋼baling strip
- "洋蔥皮" 級onion skin level
- "爸，今晚我用一下車(chē)子，" 他說(shuō)。 "除非我死了！" 他父親答道。"I'm going to take the car tonight, Dad, " he said. "Over my dead body!" his father answered.
- 在把鉆桿插入井下的過(guò)程中，他們意外地發(fā)現了一種稀有礦物的礦床。In course of sinking the well-shaft they came upon a deposit of a very rare mineral.
- 他用一條濕毯將火焰悶熄。He smothered the flame with a wet blanket.
- 低合金高強度鋼Cor-Ten
- 林級stand class
- 過(guò)級college English level test
- ＂他多次嘗試打開(kāi)車(chē)門(mén)，但都不得要領(lǐng)，因為他用錯了鑰匙。＂"All his attempts to unlock the car were futile, because he was using the wrong key."
- 登梯須從第一級開(kāi)始。He that climb a ladder must begin at the first step.
