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- Researches indicate that the new type of DTH hammer without drilling machine can make DTH hammer achieve percussive and rotary drilling using air compressor. 借鑒鑿巖機的轉釬機構,利用活塞的回程能量帶動(dòng)鉆頭旋轉。
- The mast assem-bly supports the rotary drill head and its hoisting mechanism. 支架組件支持轉動(dòng)鉆頭及其提升機構。
- The LB 28 large rotary drilling rig is an ideal complement to the LRB combined piling and drilling rigs. LB28大型旋轉鉆機是LRB組合打樁和鉆孔機器的理想補充。
- With expert chassis of Rotary drilling rig and strong box type mast, it has high working stability. 應用徐工成熟技術(shù)制造的旋挖鉆機底盤(pán)，結實(shí)的箱型臂架，具有超強穩定性；
- The forming mechanism of the bias force is the key to the study of the modulated steerable rotary drilling system. 導向力的形成機理是研制旋轉導向工具的核心。
- In modern rotary drilling, especially formulated mud is used in the well to keep the reservoir fluids in place, among other functions. 在現代旋轉鉆探作業(yè)中,經(jīng)特殊配制的泥漿的功用之一就是使油井中儲集層流體保持在原位不動(dòng)。
- However, the SEP in diamond rotary drilling was higher than the SEP in percussive drilling in lightly weathered hard as well as in extremely hard rock. 在微風(fēng)化的堅硬與極堅硬巖石中，金剛石旋轉鉆進(jìn)比功則明顯高于沖擊鑿碎比功。
- SR360 rotary drilling when drilling play in the construction of the largest pebbles are more than 50 cm, geological strength 1200 kPa. SR360旋挖鉆在施工時(shí)打出的最大的卵石有50多公分，地質(zhì)強度達到1200千帕。
- The paper introduced the use of airlifting reverse circulation rotary drilling techniques in practice of major diameter socket pile operation at Xiangfan city s Hanjiang No. 介紹了使用泥漿護壁氣舉反循環(huán)回轉鉆進(jìn)工藝進(jìn)行襄樊漢江四橋大口徑嵌巖樁的施工實(shí)踐。
- Based on analysis of application prospects of rotary drilling in petroleum drilling, this paper presents the structure and working principle of the new hydraulic kicker. 在分析了沖擊旋轉鉆井技術(shù)在石油鉆井中的應用前景的基礎上，介紹了新型液動(dòng)沖擊器結構及工作原理；
- The air in the garden was warm and fragrant. 花園里的空氣一片溫馨。
- The archers sent their shafts through the air. 弓箭手向空中射出利箭。
- Bauma 2007: New range of pure rotary drilling rigs Bauma 2007:純旋轉鉆機的新系列
- In order to avoid the pollution caused by slurry around bridge-building sites, they use dry-boring by rotary drills where possible. 橋梁施工中為減少泥漿對橋位處的環(huán)境污染，盡量采用旋轉鉆機干法成孔。
- rotary drilling cast-in-place pile 旋挖鉆孔灌注樁
- In order to avoid the pollution caused by slurry around bridge-building sites,they use dry-boring by rotary drills where possible. 橋梁施工中為減少泥漿對橋位處的環(huán)境污染，盡量采用旋轉鉆機干法成孔。
- normal-circulation rotary drilling 正循環(huán)旋轉鉆進(jìn)
- The lack of air in the room make everyone sniffle. 屋子里空氣缺乏，使得每個(gè)人都頻頻吸氣。
- specific energy of rotary drilling 旋轉鉆進(jìn)比功
- During the intermission, let's go out for some fresh air. 幕間休息時(shí)，我們出去呼吸呼吸新鮮空氣吧。
