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- Beginning with increase in service life of bit and decresae in manufacturing cost of bit,the authors make an approach to the way to decrease in drilling footage cost about DTH bit. 本文从提高钻头寿命和降低其制造成本的角度出发，探讨了降低潜孔钻头使用成本的途径。
- Drilling efficiency and service life of bit are guaranteed by using superior monocrystalline diamond impregnating pads according to specific applications and which have good self-sharpening property. 针对性配方优质单晶金刚石孕镶块，自锐性强，保证钻进的效率和寿命。
- The quantitative ralation between the life of the waw blade and related parameters of bit formulation was obtained through strict theoretical calculation and derivation. 定量研究结论与有关定性结果完全吻合,这说明该研究所得锯片性能与其刀头配方参数间的定量关系是可行的;
- Sure, his dad is a lush, but he's always the life of the party. 没错，他父亲是个酒鬼，但他永远是宴会的灵魂人物。
- She had led a life of luxury and privilege. 她过著养尊处优的生活。
- We hope to have a life of happiness and prosperity. 我们希望拥有成功幸福的生活。
- I always have a lot of bit and pieces in my coat pocket. 我的大衣口袋里总是装著零七八碎的东西。
- They attempted the life of the dictator. 他们试图杀死这个独裁者。
- The life of the patient is at stake. 病人的生命在危急中。
- A life of ease is a difficult pursuit. 优悠自在的生活，是一个难以追求的东西。
- The life of the sick man is at stake. 病人的生命危在旦夕。
- The book portrays the life of an actor. 这本书描述了一个演员的一生。
- George stayed out of the social life of the school. 乔治置身于该校社交生活之外。
- The children modeled a ship out of bit of wood. 孩子们用木片制作轮船模型。
- Calculation of wear life of driving chain on drilling rigs. 石油钻机传动链条磨损寿命的计算
- Does your dog bite? ie Is it in the habit of biting people? 你的狗咬人吗?
- A democratic may of life is a life of give and take. 民主的生活方式是一种公平交换的生活。
- He was tempted into a life of crime by greed and laziness. 他受贪婪和懒惰的驱使步入了罪恶的一生。
- Technology of bit automatic feed for disc brake. 盘式刹车自动送钻技术
- Many prisoners, on being freed, regress to a life of crime. 许多囚犯，一旦获释，仍去犯罪。
