采用土钻法和盆栽试验研究了渭北地区主要造林树种的垂直根系分布特征及其抗旱性。
Methods of soil auger and pot experiment were used to research vertical root distributions and drought resistance of main planting tree species in the Weibei loess plateau.
采用大口径土钻对间作种植模式下冬小麦与春玉米根系进行取样，分析了两种作物根系的空间分布及动态变化规律。
In this paper, root samples of winter wheat and spring maize under intercropping were taken with large-bore soil auger, and the dynamics of their spatiotemporal distribution were studied.
蚯蚓钻土很深。
妈妈：因为蚯蚓弟弟会钻土，大地会保护他啊。
Mother: earthworms because his brother will be drilled soil the land will protect him ah.
妈妈：因为蚯蚓弟弟会钻土，大地会掩护他啊。
Mom: because the earthworm younger brother will drill the earth, the earth will protect him!
采用两种不同螺旋角钻具对粘土进行输土实验，对比阻力结果证明了理论的正确性。
When rotation speed is low, factors effecting soil delivering resistance are the soil volume carried by the vane and the spiral angle of drill.
对螺旋钻具输土速度与阻力进行理论分析，给出了输土速度公式和阻力公式。
The speed of soil delivering and resistance of auger drill are analyzed theoretically and their formulae are presented.
长螺旋钻管内泵压CFG桩施工技术在太原部分地区扰动敏感性土中应用时，常出现严重缩径质量问题。
Serious necking quality problems often appear when the CFG piles construction technology of long spiral drill pipe by pump pressure apply in some disturbed sensitive soil areas of Taiyuan.
土体的可压缩性和土的摩尔·库伦强度极限平衡理论为无钻杆钻具自救机理提供了理论依据。
The compressibility and the theory of Mohr-Coulomb Intensity limit equilibrium of soil, provides the basis for the self-rescue principle of rodless drilling unit.
土体的可压缩性和土的摩尔·库伦强度极限平衡理论为无钻杆钻具自救机理提供了理论依据。
The compressibility and the theory of Mohr-Coulomb Intensity limit equilibrium of soil, provides the basis for the self-rescue principle of rodless drilling unit.
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