GPS 的标准精度定位(Standard Positioning System, SPS) ：一般民间使用 者皆可使用无需付任何费用，大部份的GPS 的接收机皆可使用标准精度定 位。
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传统的GPS标准定位精度并不高，在取消SA选择可用性之后为10 - 15米，这极大限制了中高等精度定位的应用。
The precision of traditional GPS standard positioning is not satisfied, it is limited within 10-15 meters even though sa has been canceled.
分析了HSK工具系统DIN 标准与ISO 标准之间的主要差异及其对定位精度和联接刚度的影响。
The main difference between the Germanic DIN standard and ISO standard of HSK tool system and its influence on the features such as orientating accuracy and integrating rigidity are analyzed.
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