...淀粉粒(starch grains)，经 放大后可见各淀粉粒在较小之一端有一脐(hilum )，以脐为中心，其周围有 许多环纹层(concentric layer)隐隐可见。加碘液(iodine solution)一小滴 于材料上，淀粉粒可呈蓝色反应。
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cable with concentric protective layer 同心式保护层结构
concentric double layer winding 同心式双层绕组
The method of decomposition and machinability evaluation used for multi-layer and concentric holes of complex box-shaped parts is discussed and it has been applied to CAPP-NC system.
针对复杂箱体多层同轴孔的分解和加工性判断进行了研究，并应用于CAPP - NC系统中。
The dryer shaft is welded with several sets of multi-layer non-concentric seamless tubes, each of which is comprised of multiple seamless tubes having different sizes bent in Archimede's spiral.
干燥机轴焊有多套，多层不同心无缝管，每套有多根大小不同弯成阿基米德螺旋线形无缝管组成。
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