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.
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.
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。
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