hard-to-drill 中文意思是什麼
hard-to-drill
解釋
難鉆進的-
This drilling adopts crank connecting link and walking beam percussion mechanism, which make the drilling possess two percussive functions, normal drilling takes connecting link impact as main mode, when encountering special situation and the connecting link impact can not drill, it can transform into hoisting impact, the stroke length can be modulated, it realizes automatic percussive drilling due to continuous operating of connecting link percussive mechanism, these can enhance drilling efficiency and relieve labor intensity ; it adopts pumping reverse circulation to drain slag, which not only resolves the drilling difficulty in special stratum such as pebble and gravel stratum and hard stratum, but also resolves the problem that the percussive drill ' s efficiency is low ; it adopts spur gear differential mechanism as double cylinders lazy tongs of main hoist, which not only ensures the balance state of drilling tool, but also reduces the mechanical design, and reduces the cost ; the bottom plate traveling motion of this drilling machine adopts walking type ; the drilling tower adopts hydraulic pressure uprising, and reduces the assistant operating time
該鉆機採用曲柄連桿、游梁式沖擊機構，使鉆機具有兩種沖擊功能;正常鉆進以連桿沖擊為主，遇到特殊情況，用連桿沖擊不能鉆進時，可轉為卷揚沖擊，沖程可調，因連桿沖擊機構連續工作，所以實現了自動沖擊鉆進，可提高鉆進效率，減輕勞動強度;採用泵吸反循環的方式排渣，既能有效解決卵礫石地層、堅硬地層等特殊地層鉆進的困難，又很好地解決了沖擊鉆機效率低下的問題;採用直齒圓柱齒輪差速機構作為主卷揚的雙筒同步機構，既保證了鉆具處于平衡狀態，又大大簡化了該機構設計，降低了成本;該鉆機底盤行走移位採用步履式;鉆塔採用液壓起立，減少了輔助作業時間。 -
Drill efficiency could be promoted sharply in penetration of high - medium hard sand rock rock formation. its wings are of higher wear resistance and impact efficiency. to repeat repair grind are not necessary
大幅提高中硬巖層砂巖的鉆進效率，刀翼耐磨抗沖擊性強，不需反復修磨，鉆頭壽命長。 -
Precision seeder, grain drill seeder, hill - drop planter, seeding monomer, and seed sowing device for the first time are realize to be tested on one comprehensive test - bed, and at the same time, hard problem of evaluating seeding accuracy from seed kernel space interval is solved
該系統首次實現了對精密播種機、穀物條播機、穴播機，及排種器等多類型播種機具播種精度的檢測，解決了通過直接獲得種子粒間距而檢測播種精度這一難點問題。 -
Until recently, scientists havebeen unable to devise a drill which would be capable of cutting through hard rock at greatdepths
直至今日，科學家尚未能設計出一種能鉆透極深處堅硬巖石之鉆探機。 -
The present situation of many areas lack water seriously in china and execution of strategy of national geology survey makes it become urgent assignment that how to drill soft - middle hard rock rapidly and with high efficiency encountered frequently in drought and water - scarce area
摘要中國許多地區嚴重缺水的現狀及國家地質大調查戰略的實施，使得如何快速、高效鉆進乾旱缺水地區大量遇到的軟中硬巖層成為當務之急。 -
The stroke reverse circulation drilling machine of czf2000 - 1800 type is produced by our company newly to adapt to the demand of percussion drill market due to the development of road and bridge industry, it is specializedly used for pore forming of pebble and gravel stratum and hard stratum
1800型沖擊反循環鉆機是我公司最新研製生產的為適應我國路橋事業發展對沖擊鉆機市場的需求，專門用於卵礫石地層、堅硬地層中成孔的鉆機。
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