一、前言 我国目前还没有《天然板石》标准,而世界上的许多国家,如美国、英国、西班牙、法国、德国、日本等国家都制订了相应的标准,以规范行业的发展,保护及合理利用资源。为了使制定后的标准适应当前经济发展的需要,更好地满足生产、流通、进出口贸 I. Foreword At present, there is no standard of “natural slab” in our country. However, many countries in the world, such as the United States, Britain, Spain, France, Germany and Japan, have formulated corresponding standards to standardize the development, protection and Rational use of resources. In order to adapt to the current standards after the development of the needs of the economy, to better meet the production, distribution, import and export trade