The corrections are needed for different site conditions and magnification of seismograph through the application of the equivalent station correction value for site conditions (see table 1).
不同台基和仪器放大倍数的差别，通过加等效台站校正值来改正(见表1)。
SI2 Slightly Included: Inclusions are visible under 10x magnification, and may be visible with the unaided eye. A good diamond value.
SI同样分成1,2两级，意指瑕疵在10倍放大率之下可见，并且在肉眼之下也可能被看到。也算是比较不错的钻石。
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