3下水装置须予有效地保护以防腐蚀，而其建造须能防止在救生艇筏下水时发生磨擦起火或产生碰撞火花。
3the launching appliance shall be efficiently protected against corrosion and be so constructed as to prevent incendive friction or impact sparking during the launching of the survival craft.
在已知的塑料中，四氟具有最好的耐腐蚀性，不老化，油封低磨擦系数，耐磨擦。
It has the best chemical corrosion resistance among known plastics. Without being aging, lowest friction coefficient, wear resistance.
板面手感滑润、耐磨擦、耐腐蚀且抗菌，是当前最好的家居装饰性材料。
Board feel smooth, abrasion, corrosion and bacteria is currently the best home decoration materials.
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