新变压器设计采用无缺口的壶型核，其价格低且比有缺口的壶型核供货容易。
The new transformer design used an ungapped pot core that was less costly and easier to obtain than a gapped pot core.
因为壶型核沾了聚亚胺酯，不必要的缺口被永久固定了。
Because the pot core was dipped in polyurethane, the unwanted gap was permanently fixed.
结果，圆形样品测试中，两个壶型核部分没有完全压紧，出现了不必要的空气缺口。
It turns out that, in the prototype samples we tested, the two pot-core halves were not completely pressed together, thus creating an unwanted air gap.
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