手摇计算器;
We conclude that hand-held electronic calculator sales should be approximately 446,600, 000 units by 1979.
我们推测出,1979年袖珍计算器的销售量大约为446,600, 000只.
The approximate algorithm is very simple, which can be accomplished by a hand calculator with the trigonometric function.
近似算法十分简单,使用有三角函数的手持计算器就可以完成计算。
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