It has the volume to be young, the weight is light, the fluid resistance is small, bears wearily, life long and so on merits.
它具有体积小，重量轻，流体阻力小，耐疲劳，寿命长等优点。
It has the volume to be young, the weight is light, the fluid resistance is small, bears wearily, life long and so on merits.
它具有体积小，重量轻，流体阻力小，耐疲劳，寿命长等优点。
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