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起重杆的升降 | |||
起重杆升降 | |||
起吊 | |||
起重杆升降运动 | |||
转向迎风行驶 | |||
俯仰运动; 起重机臂的转动与起落; 起重机臂转向; 上下摆动 | |||
抢风; 转向迎风; 俯仰收放运动; 升降运动 | |||
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抢风〔贴近风向〕行驶 (up); 转船首向风行驶; 使起重机吊杆起落; 改变吊杆外伸长度; 交幅 | |||
起重臂调整 | |||
转舵; 转向迎风行驶 |
luffing : 99 phrases in 11 subjects |
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