Based on the original pole net of the building, the inside turns out to be a ring-like space structure: the central district is island-style space surrounded by iron bookshelf walls.
基于建筑原有的柱网，室内呈现出环状的空间结构：中央区域为岛式空间，周边为铁制书架墙体。
2
In a permanent magnet brushless motor, airgap field excited by a 2-pole magnet ring with parallel magnetisation is sinusoidal.
永磁无刷电机中，平行充磁的2极磁环产生的气隙磁场是正弦分布的。
3
In this paper, the shock absorber with two-cylinder used them as the working fluids, in the outside cylinder there is a ring-liked gap channel around the electric pole.