adj. equant ; isodiametric
管线清管的目的是清除焊接时留在管道内的泥沙、焊渣等杂物，为管线测径和管线正常运行提供保障。
The purpose of the pipeline pigging is clear in pipe welding of mud, welding slags sundry, for pipeline caliper and normal operation of pipeline to provide security.
但是电力线信道上存在的各种噪声、衰减和多径传播等问题，这些都大大提高了通信的难度。
But the noises, the attenuation and the multipath propagation inhering in the powerline make it very difficult to realize such kind of communication system.
等径弯曲通道变形（简称ECAP）具有获得超细晶组织和改善力学性能的潜力。
The equal-channel angular pressing (ECAP) had achieved the potential for obtaining ultra-fine grain and improving mechanical properties.
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