The problems existed in the portable air sampler is summarized through practice, and make an exhaustive study on the improve method.
通过实践总结出携带式大气采样器存在的问题，并对其改进方法做了详细的研究。
The problems existed in the portable air sampler is summarized through practice, and make an exhaustive study on the improve method.
通过实践总结出携带式大气采样器存在的问题，并对其改进方法做了详细的研究。
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