In the recent years,with the raise of the microhole processing quality,all kinds of traditional microhole processing method can’t meet the need of the depth-diameter ratio.
今年来，随着对微孔加工质量要求的提高，传统的各种微孔加工方法已不能满足微孔加工的深径比要求。
参考来源 - 小锥度激光打孔技术及工艺研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The resulting laser-machined holes have a much higher aspect ratio (diameter to depth ratio) than holes achieved with standard fabrication techniques.
激光加工产生的孔比标准制造技术有更高的直径深比。
The higher the precipitation, the greater the root depth, total root length and root diameter, the more lateral roots and the lower ratio of root to shoot.
降雨量越大，根系越深、总根长越大、根系直径越大、侧根越多、根冠比越低。
Some influence of the ratio of length to diameter of SCESHL on the velocities of jetting penetrator were observed but appeared mildly on the penetration depth into water.
装药长径比对杆式射流速度有一定影响，但对水下侵彻能力影响不大。
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