Pivoting on a pin inside the hull, it swings down to provide ballast and resistance against sideways motion of the boat caused by the wind blowing from one side.
它围绕船底的一个钉子旋转，放下时提供压载力，以抵抗由于单侧风导致的船只侧向摆动。
2
The definition of ballast rated maximum temperature was analyzed, a thermal resistance model for measurement of ballast rated maximum temperature was set up.
分析了电子镇流器额定最高温度的定义，建立了电子镇流器额定最高温度测量的热阻模型。
3
It has been believed for a long time that the cutting resistance and no load resistance of railway ballast cleaning machine is big but resistance of transport ballast is small.