... 安全水域标志：safety water mark 安全速度试验：safety speed test 安全停车距离：safe stopping distance ...
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Virtual test of towed gun travel on enhanced road surface was carried out. Natural frequency of towed gun suspension system must be calculated firstly so as to ensure safety towed test speed.
对火炮在强化路上牵引进行了虚拟试验，为了确定安全的牵引试验速度，必须首先计算火炮悬挂系统的固有频率。
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