以下为句子列表：
英文: The titanium alloy valve is more superior than ordinary steel valve in lighter, smaller expansion coefficient, improves the tightness in inletting and exhausting, helps in complete combustion, and at the same time reduces noise, friction, oil consumption,
中文: 钛合金汽门比一般钢阀材质的产品更轻化、膨胀系数小，于进、排气时可提升它的气密动作，帮助完全燃烧，同时减少噪音、摩擦、油耗、震动及废气。
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英文: The titanium alloy valve is more superior than ordinary steel valve in lighter, smaller thermal expansion coefficient, lower in thermal expansion, fatigue durable, good elasticity, and reduces oil consumption so as to prevent instability while revolving a
中文: 钛合金汽门弹簧比一般钢阀材质更轻巧、热膨胀系数小、热量传导扩散更低、耐疲劳、弹性佳、减少油耗，以阻止在高速运转下的不稳定以获致最完美的性能表现。
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