外径

In the generation of a face gear by a shaper, there is the possibility of undercutting in the dedendum area of inner diameter and the pointing of the teeth in the addendun area of outer diameter.

在面齿轮的加工中，面齿轮在内径处易产生根切，而在外径处易产生齿顶变尖现象，因此面齿轮的齿宽受到了限制。

According to the calculated result, the metal flowing law, von Mises stress and the formed outer diameter of involute spline were forecasted; also the errors between the simulation result and the object dentiform of involute spline were analyzed.

根据数值模拟的结果，讨论了齿形误差及其成因；揭示了滚轧过程中金属流动规律和应力变化情况；分析了冷滚轧前轴坯直径与成形后花键最大外径的关系，提出了轴坯直径的修改建议。

An integral core rod, a round-hole diffluent bracket and an extrusion head with double tubes to the extrusion head were applied in extrusion head designing,and the designing process of the ex-trusion head was introduced in detail.

针对一种材料为低密度聚乙烯、外径1.0 mm、内径0.4 mm、壁厚0.3 mm的医用微细介入导管，设计了一种专用微管挤出机头，其特点是采用了整体芯棒、圆孔分流支架和双管机头结构，详细介绍了该挤出机头的设计过程。

Results:The main stem of descending genicular artery was 1.2±0.5 cm in length and with an external diameter of 2.6±0.6 mm at its origin.

结果：①膝降动脉的主干长1.2±0.5cm，起点外径为2.6±0.6mm，主要分支有股内侧肌支、关节支、隐支。

Results:The descending genicular artery originated from the femoral artery in 95%of the specimens with a distance of 7.8±0.8 cm to tubercle of the adductor magnus.Ninety percent of the artery gave off saphenous branch,articular branch and medial femoral muscular branch.The external diameter of the artery and its articular branch that supplies the adductor magnus tendon and femoral internal condyle is 1.9±0.4 mm and 1.4±0.4 mm indivudually.

结果：膝降动脉95%起于股动脉，起始处距收肌结节7.8±0.8 cm，膝降动脉90%发出隐支、股内侧肌支和关节支，膝降动脉和关节支起始外径分别为：1.9±0.4 mm和1.4±0.4 mm，关节支伴大收肌腱下行，分支供养大收肌腱及股骨内侧髁。

The descending one is the continuing of dorsal branch, it crosses the ulnar edge of the fifth metecarpal bone and anastomizes with the digital artery of little finger or hypothenar branch of deep palmar (accounted for 70%).

降支为腕背支的延续，经第5掌骨尺侧缘直达掌骨头颈处与小指动脉尺侧支或掌深弓小鱼际支相吻合占70%；降支至豌豆骨附近变为纤细，由小指动脉尺侧支或掌深弓小鱼际支上行与之吻合占30%；吻合外径(0.5±0.1) mm。

The blood supply of infraorbtal orbicularis oculi muscle mainly come from the angular artery,the infraorbital artery and the zygomaticoorbital artery,whose external diameter is 0.2～0.8 mm.

眼轮匝肌眶下部血供主要来源于内眦动脉、眶下动脉及颧眶动脉等分支，其外径在0.2～0.8 mm之间。

Results The micro-tubes with 0.5-0.7 mm in inner diameter, 0.9-1.5 mm in outer diameter and more than 20 mm in length were fabricated successfully through physical crossl inking without addition of toxic cross-l inker.

结果 通过物理交联成胶的方法成功制备出内径0.5 ～ 0.7 mm，外径0.9 ～ 1.5 mm，长度≥ 20 mm 的胶原-壳聚糖-PVA 复合人工泪小管。

Results:The blood supply of medial arm cutaneous nerves origined from three cutaneous branch of intermuscular septa, which from superior ulnar collateral artery, brachial artery and inferior ulnar collateral artery.The mean diameters at the originated site were 1.0 mm, 0.6 mm and 0.7 mm.

结果：臂内侧皮神经的血供来自尺侧上副动脉肌间隔皮支、肱动脉肌间隔皮支和尺侧下副动脉肌间隔皮支，起始处外径分别为1.0 mm、0.6 mm和0.7 mm，穿出深筋膜前长为1.5 cm、1.1 cm和1.2 cm。

The diameter, material and shape of the catheter may have an impact on the results of intrathecal implantation.

导管的外径、材料和形状可能对改良Yaksh法鞘内置管结果产生影响。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。