freeboard 是什么意思

	【造船】杆弦高度，杆弦。

	1.	The entrainment rate should closely decrease exponentially with freeboard height . 夹带率应几乎随自由空域高度成指数递减。
	2.	Explosions in the freeboard and gas exit system are an everpresent danger . 在自由空域以及气体出口处发生爆炸是始终存在的危险。
	3.	Influence of calcium oxide on tar cracking in freeboard of fluidized bed 氧化钙在流化床稀相段对焦油裂解的影响
	4.	Vessel with freeboard 限制吃水船

freeboard是什么意思