它们的强度是很高，但它们不是很短小的圆柱体吗？
They are strong, but aren't they just very short little cylinders in shape?
允许将符合这些要求的压顶材料用于强度超过鉴定试验中所测混凝土强度20%的圆柱体。
Capping materials conforming to these requirements is permitted to be used for cylinders with strengths up to 20 percent greater than the concrete tested in these qualification tests.
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