In 1960, only 15 percent of grades were in the "a" range, but now the rate is 43 percent, making "a" the most common grade by far.

1960年，只有15%的成绩属于“A”的范围，而现在的比例是43%，使“A”成为远高于其他分数的最常见成绩。

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Compared with microkators of same grade, this microkator is characterized by wider measurement range, high stability, long duration and shock-proof function.

与一般同精度的扭簧比较仪相比，本比较仪具有示值范围大、刻度间距宽、寿命长、稳定性好、防冲击等特点。

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