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[数]有效直径；节径；中径
1、effective tactics───有效战术
2、cost effective───有成本效益的；划算的；成本效率；[计] 成本的有效的，效能价格合算的，价格可取的; [经] 本轻利厚，成本效果
3、effective treatment───有效治疗
4、diameter───n.直径
5、inside diameter───[数]内径
6、effective cure───特效药
7、effective───adj.有效的，起作用的；实际的，实在的；给人深刻印象
8、effective measures───有效措施
9、outside diameter───外直径；外径
1、The more light pass through, the lower F number is. Shown in the following figure, F is the ration of focal length and effective diameter.───数值愈小表示通过的光量多，F数值是焦距长和有效开口的比值。
2、The bellows defines an effective diameter at zero pressure applied on the seal ring.───波纹管限定了无压力作用在密封环上时的有效直径。
3、Expressions of the resolution-effective diameter for pinholes with a double-knife-edge (DKE) profile are available in the literature.───该决议表达的有效直径为小孔的双刀口 (D K E)简介可在文学。
4、Diameter-The tolerance is the amount of variation allowed in the manufacture of the tap.───公差是在丝锥的制造中所允许的变异量。
5、The original design of valve plate to open the gas valve is hanging in the channel, the possession of an effective diameter about 20%.───原设计阀板打开是悬于阀体的气体通道内，占有有效通径20%左右。
6、Effect of Preparation Conditions on the Effective Diameter and Saturation Magnetization of Dextran Magnetic Iron Oxide Nanoparticles───葡聚糖氧化铁磁性纳米颗粒的制备条件对其有效粒径和比饱和磁化强度的影响
7、the positioning velocity, the smaller the dynamic effective diameter;───速度偏离其最优值越多，有效作用直径就越大；
8、The effective diameter of the motor pulley is obtained by subtracting 5 mm from the outer diameter.───马达皮带轮的有效直径为外径减5mm的数值。
9、An experimental method was developed to determine the effective diameter of the probes as a quasi-continuous function of frequency.───实验方法，以确定有效直径探头作为准连续函数的频率。