分析结果表明：梯壁植草能大大提高梯田的蓄水保土效益和柑橘产量。
The result shows that grass planting on terrace wall can greatly improve the efficiency of water and soil conservation and orange yield of different types of terraces.
主甲板机舱棚围壁和梯道环围等处安装的门为带闭门器的防火门。
Doors of engine casing and stair casing on main deck are of fire doors with self-closing device.
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