backpack and hydration system
...跑鞋 (不可穿凉鞋) Closed-toe Running Shoes (No sandals) 背包和水袋 Backpack and Hydration System 身份证和八达通卡（至少有50元馀额）ID Card and Octopus Card (with at least $50 storage) ..
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backpack and hydration system
背包和补水系统
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The most significant upper body protectors for expert riders include full-face helmets, spine protector and backpack hydration system.
最显著的上半身保护专家车手包括全断面头盔，脊柱保护者和背包水化系统。
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