Then, Schmidt says, once the stone rings were finished, the ancient builders covered them over with dirt. Eventually, they placed another ring nearby or on top of the old one.
Then, Schmidt says, once the stone rings were finished, the ancient builders covered them over with dirt.Eventually, they placed another ring nearby or on top of the old one.
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3. 像橄榄石这样的密砂能够抵抗风化，所以能够经受常年不断的潮汐拍打。
Dense sands like olivine are also resistant to weathering, allowing it to endure millennia of constant waves. (Magnification 110x).
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4. 说到密石，总让人有一种怜惜而心痛的感觉。
Speaking of stone, the people have a sense of Lianxi and heartache.
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5. 就是庭院景观石的摆放距离，太密看了花眼，太疏显得冷清。
Is the courtyard landscape stone put distance, too close to see presbyopia, too thin appear cold and cheerless.
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6. 靶体为水泥砂浆石靶、钢纤维混凝土靶和含单层密排刚玉球的钢纤维混凝土靶。
These concrete targets are cement mortar, steel fiber reinforced concrete (SFRC) and the SFRC with a board made by tightly arranged corundum spheres inside.
The penetration depth into SFRC with the board is decreased about 11%, but the penetration depth into cement mortar is increased about 12% as compared with that into the SFRC.
The penetration depth into SFRC with the board is decreased about 11%, but the penetration depth into cement mortar is increased about 12% as compared with that into the SFRC.
