对于颗粒测试来说，长径比与长宽比的概念相同，即：经过颗粒内部的最长径，和与它相垂直的最长径之比，如图所示，此参数常用来表述颗粒形貌，以判断其形状是否接近于正形体，在针状颗粒的判断中具有实用价值。使用颗粒图像工作站测试，此设备用图像法原理，可以在颗粒投影面中找到R1和R2，并获取其比值，还可以将多个颗粒的长径比进行分析统计。
螺杆长径比 Screw Ratio ; Screw diameter ratio ; Screw Dia ; Draw Ratio of Screw
喷孔长径比 flyweight ; nozzle hole diameter ; [动力] length-diameter ratio of spray orifice ; length-diameter ratio of hole
螺杆直径及长径比 Screw diamster & ribbon width
纤维长径比 aspect ratio of fiber
试样长径比 slenderness ratio of specimen
最佳长径比 Optimal length-diameter ratio
窑的长径比 length-to-diameter ratio of kiln
长度直径比 length diameter ratio ; length-diameter ; length-to-diameter ratio ; LD
直径长度比 length to diameter ratio
不同桩径不同长径比的桩的承载特性是不同的。
Pile's bearing features differ with diameter and length-diameter ratio.
不同边界条件和不同长径比呈现出不同的屈曲模态。
It is found that PTCSs with different LDR and boundary conditions have different buckling modes.
对横掠不同长径比的椭圆管的换热和流动特性进行了研究。
Heat transfer characteristics and flow behaviors of elliptic cylinders with different axis ratio kin crossflow are investigated experimentally.
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