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标备夯实仪是求土壤最大密度和最佳含水量之仪器。原有的操作方法是用人力将2.5公斤的铁锤提至30公分高处下击,每一次试验需打上60~120次才可求出图解上一点,要求一种土壤的最佳含水量和最大密度,
Preparation of compaction device is to seek the maximum density of soil and the best moisture content of the instrument. The original method of operation is to manually lift a 2.5 kg hammer to a height of 30 cm. Each test requires 60 to 120 strokes to find the point. It requires a soil with the best moisture content and Maximum density,