Such as testing the strength of concrete, not of the same age and some of the effects of phase mixing on the impact of the test.
如混凝土强度的检测范围，不同龄期的影响及部分掺加剂对测试的影响等。
Such as testing the strength of concrete, not of the same age and some of the effects of phase mixing on the impact of the test.
如混凝土强度的检测范围，不同龄期的影响及部分掺加剂对测试的影响等。
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