The taper ring's irregular section shape decide the unequal forming of the ring metal when rolling ring, which is the main cause of irregular wide spread and draw concave on the symmetry face of ring.

锥形套圈由于它截面形状的不规则性决定了辗扩过程金属变形的不均匀性，这是导致不规则宽展、拉凹的主要原因。

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Stainless steel mica heater with ring type and plate shape, irregular shape and so on.

不锈钢云母加热器有圈型和板状，异型等规格。

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