[机械行业标准] JB/T 9227-2013 铸造用膨润土 清晰版
[国外标准] BS EN ISO 9227-2006 Corrosion tests in artificial atmospheres Salt spray tests Supersedes
[机械行业标准] JB/T 9227-2013 铸造用膨润土
[机械行业标准] JB/T 9227-1999 铸造用膨润土和粘土