So in the construction industry concrete is the stuff that results when you mix cement with filler material like sand or gravel.
因此在建筑业范围内，混凝土是水泥与沙或沙砾等填充物混合之后的产物。
The causes to such defects as cracking and sand inclusion in the integral rear draft lug and the body center plate filler are analyzed, and the technology improvement measures are described.
分析了一体式后从板座及上心盘座裂纹、夹砂等缺陷产生的原因，并介绍了工艺改进措施。
These alloys are used for welding and brazing filler materials and for sand and die castings.
这些合金用于定位焊接和铜焊的焊料，和用做打磨或模铸。
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