- clear cross test
- 有效: effective; valid; efficaciou ...
- 截面: section; cross section; cros ...
- 试验: experiment; test; trial
- 有效截面: available crosssection; clear opening; effective coross-section; effective cross ection; effective cross section; effective cross-section; effective cross-secton; effective crossover; effective section; free area; net section; useful cross section
- 有效截面积: free area; net sectional area
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