... 焊缝welding seam 钢筋混凝土快reinforced concrete lump 超引起听觉的振动波探伤检查ultrasonic examination ...
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The blasted objectives are scrap iron lump of several tens ton weight, reinforced concrete beam, pillar and side wall respectively. The work-condition is harsh.
这三次爆破目标是重达几十吨的废铁铊、钢筋混凝土梁、柱和边墙，其作业条件苛刻。
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