Added stainless-steel ring to further reinforce the carbon fiber, ensuring its durability under heavy loads, also cuts the vertical vibration transmission.
为了进一步加强碳纤维的强度，加入了不锈钢环来保证它在承受重量下的耐用度，并且同时剪断沿著碳纤维壁垂直传递的微震动。
Objective: to study the possibility of vertical transmission of hepatitis C virus and its epidemiological significance.
目的：探讨HCV母婴传播的可能性及其在流行病学中的意义。
Objective: to study the possibility of vertical transmission of hepatitis C virus and its epidemiological significance.
目的：探讨HCV母婴传播的可能性及其在流行病学中的意义。
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