... arch abutment 拱台 arch apex 拱顶石 arch bar 拱杆 ...
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arch apex subsidence 拱顶下沉
·2,447,543篇论文数据，部分数据来源于NoteExpress
key stone , arch crown
An arch having cusps in the intrados on either side of the apex.
在顶点两侧的内弧面上仍然有尖端的拱。
youdao
Finally, the coal-rock mass in the arch angle and apex is slided, and causes the distortion of local rock pressure, even induces dynamic hazards around working face.
拱角与拱顶煤岩滑落失稳，造成工作面局部压力畸变并诱发动力学灾害。
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