sand-gravel fill 砂砾石填筑
hydraulic gravel fill 水力砾石充填
concrete face sand-gravel-fill dam 砂砾石面板坝
concrete face sandy gravel-fill dam 砂砾石均质面板坝
More gravel is needed to fill the hollow in the drive.
需要更多的砾石来填平车道上的坑洼。
More gravel is needed to fill the hollow in the driveway.
在车道的凹地上需要填更多的沙砾。
The results show that the performances of graded gravel mixture are improved significantly after being treated with cement and lime, especially when fill factor is 0.
研究表明，掺加二灰后级配碎石混合料的性能显著提高，特别是二灰的填充系数为0。
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