12. Corrosion on Aluminum vessels is also generally in the form of localized pitting to the hull plate, rudders, bilge keels and particularly in way of weld seams.
铝制船舶上的腐蚀的通常形式是船体钢板、船舵、船底龙骨上的局部点状腐蚀,特别是在焊缝方面。
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13. The structural element consists of a construction formwork mesh sheet (1) and light steel keels (2) and (3) which are connected by self-tapping screws or rivets.
结构体由建筑模网网片(1)及轻钢龙骨(2)和(3)构成,以自攻钉或铆钉连接。
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14. While the current devices differ in design, those devices with keels violating the endplates present the risk of complications associated with vertebral body damage.
目前的器械设计各不相同,带有干扰终板的突起的器械存在椎体损害相关并发症的可能。
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15. Satisfactory results have been obtained by applying this method to calculate motions of different types of ship, including those body-plan sections with bilge keels.
此方法已对各种不同的船型剖面,包括具有舭龙骨剖面的船舶进行了运动计算,并获得了满意的结果。
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16. Fixed keels and centerboards each have their own benefits but also disadvantages. When deciding what type of boat to buy, be sure you have considered these differences.
固定龙骨和活动龙骨各有其优势和缺陷,当在其中进行选购时,确保你考虑了以下这些差异。
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17. A portable flood control apparatus consists of: uniform leakage-proof nylon fabric units, plastic-steel triangular keel supports, keels, fender-guards, gravity device, connecting bolts and fasteners.