They stacked rocks with center holes (tube or doughnut shaped) from the surface to the deep stone layer as a guide for their drills (similar to today's guide tubes).
管状或中空管状的中心孔从地表到深石岩石层放满石头，以作为铁转的探头，作用类似今天的导管。
Guide magnet yoke of stator is hollow circular cylinder shaped, and is made up of magnetic conduction metallic material;
定子导磁铁轭为中空圆柱形，由导磁金属材料制成；
The results show that the developed model can guide the design and application of the conically-shaped dielectric EAP actuators.
研究结果表明，本文的建立的模型可以为锥形介电型EAP驱动器的设计应用提供参考依据。
Dear teacher, you have been a great mentor and guide and have shaped my career well.
亲爱的老师，您一直是一位良师和导师，帮我规划了职业生涯。
Special-shaped wave-guide plays an important role in radar system, so there is higher quality requirement on geometry.
异形波导件在雷达系统中起传导光波信号的作用，应用广泛，几何尺寸要求严格。
The invention relates to a method for aligning the concentricity of a locking hole and a locking guide rod in a silicon steel high-temperature annealing ring-shaped heating furnace.
本发明涉及一种硅钢高温退火环形加热炉中找正锁紧孔与锁紧导杆的同心度的方法。
The outer surface of the guide post is in a wavy shape matched with the arc-shaped inner concave head form top to bottom.
导柱外表面自上而下呈与弧形内凸头配合的波浪状。
The outer surface of the guide post is in a wavy shape matched with the arc-shaped inner concave head form top to bottom.
导柱外表面自上而下呈与弧形内凸头配合的波浪状。
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