The areas and perimeters of these quartz grains were calculated by GIS-based technologies.

并计算出每颗石英的周长和面积。

Users can set asset protection perimeters using the system's location awareness technology.

用户还能利用该系统的定位感知技术设定资产保护范围。

We can follow the railway lines through the security perimeters and into the elite compounds.

跟着铁路线穿过保安区就进入了核心地带。

Study of deduction of flute making vibration frequency formula and validation of physical perimeters.

对笛子制作频率公式的推导和物理量的验证进行了探讨。

Security perimeters are essential for any big competition and are important for the smooth process of security.

场地周边安保系统的好坏是大型赛事能否成功的根本之所在，也是赛事安保能否顺畅运行的关键。