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[1](2s)：single shell fall, concrete;[2](2s)：single shell fall, concrete;[3](2s)：single shell fall, concrete;[4](2s)：two shells falling, concrete;[5](3s)：a few shells falling, concrete;[6](6s)：many shells falling, concrete下载 收藏gun / 壳(shell)x1倍举报
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[1](1s)：single shell fall, wood;[2](2s)：single shell fall, wood;[3](2s)：two shells falling, wood;[4](3s)：a few shells falling, wood;[5](5s)：many shells falling, wood下载 收藏gun / 壳(shell)x1倍举报
