在顶点两侧的内弧面上仍然有尖端的拱。
An arch having cusps in the intrados on either side of the apex.
当鼠洞垮塌卸料时，落下的材料常常在出料口上方变得致密而形成拱弧。
While some material may discharge as the rat hole collapses, falling material often gets compacted over the outlet and forms an arch.
有水平拱背和水平的内弧面的互相支撑的拱石的拱。
An arch with mutually supporting voussoirs that has a straight horizontal extrados and intrados.
传统的前向拱丝越来越难以满足目前封装的高密度要求，反向拱丝能满足非常低的弧高的要求。
Traditional forward looping technology is becoming hard to meet high-density requirements of IC Packaging, and reverse looping can comparatively achieve very low loop height.
传统的前向拱丝越来越难以满足目前封装的高密度要求，反向拱丝能满足非常低的弧高的要求。
Traditional forward looping technology is becoming hard to meet high-density requirements of IC Packaging, and reverse looping can comparatively achieve very low loop height.
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