- shaft area
- 矿井: mine; pit; grube; groove; sh ...
- 截面: section; cross section; cros ...
- 积: amass; store up; accumulate
- 截面积: area of section; cross section area; cross sectional area; cross-section area; crosssectional area; csa; s a; sec. ar; section surface; sectionalarea
- 截面积,断面积: section area
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