The construction technology was introduced from the materials selection of verticallocking 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。
2
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.