通过对等密度线的测定，查明了不同粒度铁粉的压坯密度变化，以及在不同压力下压坯密度变化的规律。
By measuring the equal density curves, the changes of compact density of iron powders with different particle size and different pressure were investigated.
线骨密度仪测定的椎体形态学：椎体高度的参考数据？
Vertebral morphometry by X-ray absorptiometry: Which reference data for vertebral heights?
分别采用DD60A和D51 密度仪测定制丝生产线冷却后和储丝后成品烟丝样品，并将两者的测定结果进行分析，对这两台仪器性能进行比较并作出评价。
The samples of cut tobacco after cooling and storing were tested with DD60A and D51, the(results) were analyzed and the performances of these two densimeters were compared and evaluated.
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