All the products we provide excess the chinese national standard and are authorized as the green products . and our major products meet the astm bs standard 公司提供的所有材料均超过中国国家标准，并通过绿色产品认证，主要产品达到美国astm标准英国bs标准。
Meanwhile we own five slate quarries : s1120 , p014 , p010 , p018 and p015 . we have four plants which produce with 40 varieties of slate . all of them are qualified with chinese national standard and bs680 and also astm 生产经营的板岩品种将近40余种，颜色有：绿色黄色白色黑色粉色红色等，全部达到国家标准和英国bs680以及美国astm标准。
We have our own quarries including gray , green , black , multicolor , purple , yellow colors etc . our factories and workshops are also nearby the quarries . all these advantages make us very competitive on stable supply and attractive prices 生产经营的板岩品种将近40余种，颜色有：绿色黄色白色黑色粉色红色等，全部达到国家标准和英国bs680以及美国astm标准。
The investigation of a lot of parameters about treated sandstone , brick materials and earthen materials with fluorited polymers has been carried out , such as the formation of polymer , the penetration depth , porosity , capillary absorption and penetration coefficient , water uptake , compressive strength , drilling resistance , absorption isotherms of water vapor , water vapor diffusion , color changes as well as resistance to desegregation of water , frizzing - throwing cycles , worming - cooling cycles , and so on . in addition , the influence of salt crystallization , acid and base , and uv aging have also been assessed in order to better understand the protection effects and utilization possibility of two fluorinated polymers , mainly according to astm standard and the combination of international methods together with general technological 分别以国家级文物保护单位的土质、砂岩和砖材文物样品为对象，依据astm标准及国际通用文物保护研究方法与评估准则相结合，通过胶化物形成周期、渗透深度、孔隙度、毛细吸水和渗透系数、持水量、抗压强度、抗钻强度、吸附水蒸气的能力、透气性、外观颜色等系列参数的测定，及冻融、冷热循环、酸碱腐蚀后抗压强度的衰减、可溶盐对保护效果的影响、酸碱及光照对表面保护效果的影响，对两种含氟聚合物及其与有机硅的共混物在文物加固保护和表面防护中的可行性和保护效果给予了系统研究。
In this research the method to test and evaluate the gic of the stitched - fabric - enforced laminates , the definition of the stitching - parameters , the testing clap were discussed according to the standard of astm . in addition , we got the useful experiment results of the gic by using the clap which we designed in the research 试验是依据现行的astm标准，并对测试夹具、试片的形状尺寸等进行了适当改进，参照astm及jis标准中的数据处理与计算方法测试、评价了不同缝合工艺层合板复合材料的层间断裂韧性值( g _ ( ic ) ) 。
