方钻杆
Analysis on φ 88.9mm square Kelly break in well WS1
WS1井φ88.9mm四方钻杆断裂原因分析
Kelly: The dragon dance in the town square was really spectacular.
凯利: 城市广场上的舞龙,真是令人叹为观止.
纳米英语 · 双语娱乐资讯