n.改变起重臂倾角...

derricking的音标：derricking的英式发音音标为：['derɪkɪŋ]derricking的美式发音音标为：['derɪkɪŋ]...

Main Application: Various equipment for derricking, lifting and drawing.重要用途: 各种起重 、 提升和牵引设备及重要机械和仪器等....