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Objective to contrast study on the effect of sterilization or no sterilization for the bottle stopper of the plastic lid.
目的对比研究塑料瓶盖的液体瓶塞进行消毒与不消毒的效果。
But over the past 10 years, an estimated 20% of the bottle stopper market has been replaced by a new technology-plastic corks that cost between 2 and 20 cents apiece.
但在过去10年，估计有20%的瓶塞市场已经被一种成本在2 - 20美分的新型高科技塑料软木瓶塞取代。
The manufacture cost of the utility model is also the same as the single softwood or plastic thermos bottle stopper.
当应用本实用新型时，其制造成本与单一的软木或塑料保温瓶塞几乎一样。
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