What is the maximum sound level of the toy is accepted?
你认为玩具所发出的声音最高是多少分贝?。
The maximum sound pressure level standards of Beijing Olympic Organizing Committee is introduced.
引用奥组委对最大声压级的具体要求。
The maximum sound pressure level standards of Beijing Olympic Organizing Committee is introduced.
引用奥组委对最大声压级的具体要求。
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