effective diameter

基本解释

Effective Diameter-The tolerance is the amount of variation allowed in the manufacture of the tap.
中径一公差是在丝锥的制造中所允许的变异量。
Objective To investigate the effect of preparation conditions on the effective diameter and saturation magnetization (Ms) of dextran magnetic iron oxide nanoparticles (DMN).
目的探讨葡聚糖氧化铁磁性纳米颗粒（DMN）的制备对其有效粒径和比饱和磁化强度的影响。
The model shows that the higher the positioning velocity, the smaller the dynamic effective diameter;
触测速度偏离其最优值越多，有效作用直径就越大；
www.cmemo.org.cn

If the collecting area is in pieces, the effective diameter (the distance between the two most widely spaced pieces) can be several thousand kilometres.
ECONOMIST: Radio telescopes
SKA's proponents are talking of scattering its sub-telescopes over an area of 1m square kilometres, which would create an effective diameter of about 1, 000km.
ECONOMIST: Radio telescopes