If the centerboard is not weighted, like the fiberglass centerboards of many small sailboats, then sailors must keep the boat upright by positioning their own weight on the upwind side of the boat.
如果活动龙骨不带负重，例如许多小型帆船使用的玻璃纤维活动龙骨，那么水手们必须通过将他们自己的体重压在船只的逆风侧来保持船只直立。
The finest gloss magnifier for your auto, car, truck, tractor (lol), airplane, boat, motorcycle, glass, stainless steel, fiberglass, wheels and chrome available.
最好的光泽放大镜为你的汽车，轿车，卡车，拖拉机(笑)，飞机，轮船，摩托车，玻璃，不锈钢，玻璃钢，车轮和铬可用。
When you factor in the repair expenses to the overall expense of running a boat, you will quickly see the benefits of fiberglass.
特别是当你在比较维修费用占整个船舶管理费用的比例时，你就能很快的看到使用玻璃钢的好处了。
When you factor in the repair expenses to the overall expense of running a boat, you will quickly see the benefits of fiberglass.
特别是当你在比较维修费用占整个船舶管理费用的比例时，你就能很快的看到使用玻璃钢的好处了。
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