- 不對(duì)稱(chēng)斷面
- non symmetrical section: 不對(duì)稱(chēng)斷面
- symmetrical section: 對(duì)稱(chēng)斷面型鋼; 對(duì)稱(chēng)截面; 對(duì)稱(chēng)狀分段
- non symmetrical: 非對(duì)稱(chēng)的
- doubly symmetrical section: 雙對(duì)稱(chēng)斷面
- symmetrical aerofoil section: 對(duì)稱(chēng)流線(xiàn)型切面
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