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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. 借鑒鑿岩機的轉釺機構,利用活塞的回程能量帶動鑽頭旋轉。
- The mast assem-bly supports the rotary drill head and its hoisting mechanism. 支架組件支持轉動鑽頭及其提升機構。
- The LB 28 large rotary drilling rig is an ideal complement to the LRB combined piling and drilling rigs. LB28大型旋轉鑽機是LRB組合打樁和鑽孔機器的理想補充。
- With expert chassis of Rotary drilling rig and strong box type mast, it has high working stability. 應用徐工成熟技術製造的旋挖鑽機底盤,結實的箱型臂架,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製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. 在現代旋轉鑽探作業中,經特殊配製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。
- 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. 在微風化的堅硬與極堅硬岩石中,金剛石旋轉鑽進比功則明顯高於衝擊鑿碎比功。
- SR360 rotary drilling when drilling play in the construction of the largest pebbles are more than 50 cm, geological strength 1200 kPa. SR360旋挖鑽在施工時打出的最大的卵石有50多公分,地質強度達到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迴轉鑽進工藝進行襄樊漢江四橋大口徑嵌岩樁的施工實踐。
- 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. 在分析了衝擊旋轉鑽井技術在石油鑽井中的應用前景的基礎上,介紹了新型液動衝擊器結構及工作原理;
- The air in the garden was warm and fragrant. 花園裡的空氣一片溫馨。
- 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:純旋轉鑽機的新系列
- In order to avoid the pollution caused by slurry around bridge-building sites, they use dry-boring by rotary drills where possible. 橋樑施工中為減少泥漿對橋位處的環境污染,盡量採用旋轉鑽機干法成孔。
- rotary drilling cast-in-place pile 旋挖鑽孔灌注樁
- In order to avoid the pollution caused by slurry around bridge-building sites,they use dry-boring by rotary drills where possible. 橋樑施工中為減少泥漿對橋位處的環境污染,盡量採用旋轉鑽機干法成孔。
- normal-circulation rotary drilling 正循環旋轉鑽進
- The lack of air in the room make everyone sniffle. 屋子裡空氣缺乏,使得每個人都頻頻吸氣。
- specific energy of rotary drilling 旋轉鑽進比功
- During the intermission, let's go out for some fresh air. 幕間休息時,我們出去呼吸呼吸新鮮空氣吧。