名词
中文翻译：螺旋形外壳
同义词：
['helix', 'spiral shell']
例句：
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1.The helical casing of the cable is designed to protect it from damage.
电缆的螺旋形外壳设计用来保护它免受损坏。
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2. The scientist discovered a new type of helical casing that could be used for medical implants.
科学家发现了一种新型的螺旋形外壳，可用于医疗植入物。
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3. The helical casing was made of strong materials and was resistant to corrosion.
螺旋形外壳由强材料制成，具有抗腐蚀性能。