Abstract: the artificial sand in construction industry use more and more general already, artificial sand powder content beyond specification limits the scope of its use.
摘要：人工砂在建筑行业中使用已越来越普遍，人工砂石粉含量超出规范要求限制了其使用范围。
How much do you know about the high speed rail industry, building materials is a general designation of the materials used in civil engineering and construction engineering.
高速护栏板行业您的了解有多少呢？建材是土木工程和建筑工程中使用的材料的统称。
A construction site USES two-level RCD protection in accordance with the industry standard, the RCD trips frequently in the general distribution box in the process of construction.
摘要某施工现场按照行业标准，采用两级RCD保护，施工过程中总配电箱内的RCD频繁跳闸。
A construction site USES two-level RCD protection in accordance with the industry standard, the RCD trips frequently in the general distribution box in the process of construction.
摘要某施工现场按照行业标准，采用两级RCD保护，施工过程中总配电箱内的RCD频繁跳闸。
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