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常见问题

2016-08-27 11:39

QA/QC Introduction

National test standard(GBIT18600-2001) 
Slab slate     Roofing slate 
Water absorption <=0.70%     <=0.50% 
Bending strength >=10.0MPa >=40.0MPa 
Resist climate softening depth <=0.65mm <=0.35mm 


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