| 1. | The great body of the bridge flooring and the suspenders was swayed to and fro .
庞大的桥面躯体和吊杆来回地摆动。 |
| 2. | The lower ends of the two hangers in fig. 1-38 were at the same elevation before the loads were applied .
在图1-38中，两根吊杆的下端在加载之前位于同一高度上。 |
| 3. | To raise or lower ( the boom of a crane or derrick
起重吊杆是一种最简单的起重机。 |
| 4. | The crane at hatch no . 1 is out of order . please have it repaired
请把吊杆甩到外档 |
| 5. | Could you give me a hand in adjusting the derrick
你是否能帮我调整一下吊杆？ |
| 6. | The ginpole is the simplest form of derrick
起重吊杆是一种最简单的起重机。 |
| 7. | Stand clear of the swinging boom of the crane
不要走近转动的超重机吊杆。 |
| 8. | He doesn ' t even know how to hold a boom
他甚至连麦克风吊杆都不知道怎么拿 |
| 9. | Derrick boom heel fittings - main dimensions
起重机吊杆枢轴配件.主要尺寸 |
| 10. | Ships ' light load derrick gooseneck brackets
船用小负荷起重吊杆转枢拖架 |
