Once a clinician determines that a patient has many risk factors, bone mineral density testing should be performed.
一旦医生确定病人有许多危险因素，骨密度测试应该进行。
The principle, structure of the NBT-1 model of density adjusting unit were introduced. It can form a complete set with the density testing meter to control the density of the paper pulp.
介绍NBT 1型浓度调节器的结构、原理，该调节器与浓度变送器配套，可以控制纸浆的浓度。
This paper introduces the work principle of gas density testing system based on SCM AT89C51, and gives the hardware structure and software flow of testing system.
本文介绍了基于AT 89 C 51单片机气体浓度测试仪的工作原理，给出了测试仪的硬件结构及软件流程。
A new standards of linear density testing method of synthetic filament yarn is analyzed and contrasted against the old one in this paper, and also introduced its application with a practical example.
分析比较合成纤维长丝线密度试验方法标准新旧版本的区别，并以实例介绍该标准的运用情况。
A new standards of linear density testing method of synthetic filament yarn is analyzed and contrasted against the old one in this paper, and also introduced its application with a practical example.
分析比较合成纤维长丝线密度试验方法标准新旧版本的区别，并以实例介绍该标准的运用情况。
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