| 摘要 |
<p>Safe or strong box (1) has parts of the housing filled with a hardenable filler (3) made from 20-35 wt.% water, 40-55 wt.% cement, 15-30 wt.% porous cement granules, and 0-25 wt.% additives. Preferred Features: The filler is made from 26-31 wt.% water, 43-52 wt.% cement, 21-26 wt.% porous cement granules, and 0-10 wt.% additives. The cement is limestone cement. 0.05-0.5 wt.% mixed oil is added to the filler.</p> |
