You should learn to others
韧性低 » Low toughness 你应该向其他人学习 » You should learn to others 你真的是太可爱了，我无法抗拒你的魅力 » You really were too lovely, I can't resist your magic power ..
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...between gears, so the number of teeth is not selected as design variables 你应该向其他人学习 » You learning from others 外形图 » Outline ..
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