The roof slice longwall method increases the work of laying false roof for next slice.
长壁采煤法的采煤工艺具有多重特点：顶分层采煤增加了要为下分层填设假顶的工作。
The man-made false roof quality is very important to the mine pit safety in production.
人工假顶的质量对矿井的安全生产至关重要。
In slicing seams, bolt supporting was utilized under false roof and obtained good result.
介绍在分层开采煤层中，在假顶条件下实现锚杆支护。
The constant temperature, static state corrosion resistant test and results of mining glass fibre net false roof materials under analog working conditions and special working conditions are presented.
本文介绍了矿用玻璃纤维网假顶材料在模拟自然工况和特殊工况条件下的恒温、静态耐腐蚀试验及结果。
The system is also prone to false alarms. When the H1N1 swine-flu pandemic stole headlines in the summer of 2009, Google searches went through the roof long before most people fell ill.
该体系也容易误报，当H1N1猪流感在2009年之夏占据新闻头条时，谷歌搜索量在很多人病倒之前大幅攀升。
The system is also prone to false alarms. When the H1N1 swine-flu pandemic stole headlines in the summer of 2009, Google searches went through the roof long before most people fell ill.
该体系也容易误报，当H1N1猪流感在2009年之夏占据新闻头条时，谷歌搜索量在很多人病倒之前大幅攀升。
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