1·Literature research of air hammer drilling in domestic and overseas.
国内外空气锤钻井技术的文献调研。
2·This paper collects air hammer' using status in oil and gas fields drilling site at home and abroad.
收集了国内外空气锤技术在油气田钻井现场的使用现状。
3·The contents of the paper include:the comparison of the electrohydraulic hammer and the steam—air hammer;
其中包括：电液锤与蒸汽-空气锤工作状况的比较；
4·This paper collects the typical structure of air hammer, understands the principle, determines the design principles and methods.
收集了国内外典型的空气锤结构，了解空气锤工作原理，确定了空气锤结构的设计原则及方法。
5·But that changes the instant you set eyes on some of the items set to go under the hammer next month as part of a sale of the contents from the Bel Air home that Michael was renting.
而这一事实，则使得部分将要出现在下个月举行的拍卖会上的物品显得与众不同，因为届时迈克尔曾在百莱荷租赁的房屋中的部分遗物将会进行拍卖。
6·She found a match with a man wearing overalls and wielding a hammer in his profile photo and invited him over to install her air conditioning.
她和一个在简介照片中身穿工装裤、手持榔头的男人配对成功，然后邀请他来帮她装空调。
7·The air-driven down-hole hammer drilling is still very effective and speedy in well drilling in karst limestone area.
在水文水井中，气动潜孔锤钻进仍可发挥它高效率、高速度的作用。
8·Taketo enforcement of such grip hammer Ji, zoned air-strike case, impassioned.
武人执之如握锤戟，划空击案，慷慨激昂。
9·Owing to spatial confined, the paper enumerates air supply pressure and backpressure which influence the working parameter of the DTH hammer only.
由于文章篇幅的限制，仅列出了气源压力、背压对空气锤工作参数的影响规律。
10·It is posed that angular air-hammer self-excited vibration and half frequency wobble self-excited vibration are two reasons for resulting angular wobble self-excited vibration for gas film face seals.
提出造成气膜端面密封角向摆动自振的内在机理，既有半频摆动自振又有角向气锤自振。