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The mechanism of casing tube s thread tripping is analyzed and the measures to prevent casing tube s thread tripping are proposed in this article. 分析了套管脱扣的机理,提出了预防套管脱扣的措施,对提高套管产品质量,减少油田掉井事故的发生具有重要的参考价值。
Norlen's thread catcher 诺伦(氏)捕线器
CNC LATHE WORK FOR CORDAGE CORE ROD'S THREAD 绳索取心钻杆螺纹的数控车削加工
By screwing in empty, unlabeled plastic drink bottles into the center sphere’s threaded holes, the lamp creates a burst of light and refraction. 将一球状灯表面进行螺丝孔加工，然后将若干用过的塑料饮料瓶除去商标，清洁干净，安装到一球状灯上，由于光线的照耀及反射，球体发出明亮炫目的光彩。
The jar’s threaded silver-colored closure houses an unusual pump that dispenses product without the use of a more traditional dip tube. 该罐的线程银色关闭房子不寻常的泵免去产品无需使用较传统的浸管。
used e.g.for buttonholes to be subsequently tacked with lockstitch;standard needle thread catcher. 可用于锁眼后需用锁式线迹加固的钮孔；
They spend the winter(s) in a warmer climate. 他们在气候较暖的地方过冬。
thread catcher 线锁边器
Most plural nouns in English end in "s". 英语的复数名词多以“s”结尾。
The sweater had shrunk after repeated washing(s). 这件套头毛衣洗过多次已缩水了。
Stock's thread catcher 斯托克(氏)泪囊手术引线器
Some old folk(s) have peculiar tastes. 有些老人有特殊的爱好。
Vienna pattern thread catcher 维也纳式钩线器
Answer the following question(s). 回答下列问题。
Most plural nouns in English end in s'. 英语的复数名词多以s结尾。
The drug affects one's power(s) of concentration. 这种药影响人精神不能集中。
Here are the designs. Which one(s) do you prefer? 这就是那些图样.;你喜欢哪一个[些]?
Which journal(s) do you subscribe to? 你订阅哪一种杂志?
The novel had an enormous vogue in the 1930's. 这本小说在三十年代曾广为流传。
He earned four A's in the final examinations. 他期末考试四门功课得优。