reverse circulation drill中文什么意思

下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯

The fault tree analysis of interruption of fluid in pump suction reverse circulation drilling
泵吸反循環(huán)鉆進(jìn)中循環(huán)液中斷的故障樹分析
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(huán)鉆機(jī)是我公司最新研制生產(chǎn)的為適應(yīng)我國(guó)路橋事業(yè)發(fā)展對(duì)沖擊鉆機(jī)市場(chǎng)的需求，專門用于卵礫石地層、堅(jiān)硬地層中成孔的鉆機(jī)。
Under the function of big pressure and dynamic load , the grains may be moved which may cause the soil body distortion . at present , the relatively ripe methods of drill in gravel layer are mostly double - wall drill pipe reverse circulation drilling , auger stem breast wall drilling and down - the - hole hammer follow down drilling
論文根據(jù)jsl ? 30型礫石鉆機(jī)潛孔錘同心跟管鉆具結(jié)構(gòu),采用程序計(jì)算得到了鉆桿內(nèi)各深度處壓力分布、鉆頭壓力降、環(huán)形空間壓力分布及空氣流速分布。

√在线天堂中文最新版网,97se亚洲综合色区,国产成人av免费网址,国产成人av在线影院无毒,成人做爰100部片