二从事河川工程河堤海堤或围堰等作业因强风大雨或地震致有立即发生危险之虞时
When engaged in river engineering operations such as river embankments, sea dikes or cofferdams, and there is an immediate risk of danger due to strong winds, heavy rain or earthquakes
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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