One is direct calculation, and the other one is Green's theorem.
一种是直接计算，另一种则是格林公式。
Microcomputer control and use of data processing, direct calculation of the performance of the sample.
采用微电脑控制和数据处理，可直接测定计算试样的各项性能。
Microcomputer control and use of data processing, direct calculation of the performance of the sample.
采用微电脑控制和数据处理，可直接测定计算试样的各项性能。
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