The construction technology was introduced from the materials selection of vertical locking side of aluminum alloy roofing, lightning protection on roofing and the whole construction process.
从直立锁边铝合金屋面的材料选用、屋面防雷和施工全过程阐述该技术的施工工艺。
By using the finite element method, the dynamic stress caused by vertical contact impact between bolt locking surface and barrel extension locking surface of a new rifle was studied.
采用有限元方法研究了某新型自动步枪枪机闭锁面与节套闭锁面间垂直接触碰撞的动应力。
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