closed string
| stair
| closed string | |
| tech. | 闭式楼梯斜梁; 全包的楼梯 |
| stair | |
| hydroel.st. | 楼梯 |
| oil | 阶梯 |
| stairs | |
| gen. | 台阶 |
| bridg.constr. | 梯子 |
| dril. | 钻台梯子 |
| eng.geol. | 楼 梯; 浮码头 |
| met. | 梯; 梯级 |
| oil | 趸船 |
| |||
| 闭式楼梯斜梁; 全包的楼梯 | |||
|
closed string : 10 phrases in 1 subject |
| Technology | 10 |