In this study, PAHs in indoor air of Shenzhen was monitored by PUF passive sampler for a period of 6~8 weeks.
利用PUF 大气被动采样技术，对深圳市室内大气多环芳烃进行了为期6~8周的连续观测。
Since then we've been working with this company to develop a commercial prototype incorporating their air sampler.
此后，我们开始和这家公司合作，结合他们的空气取样器，开发出了商业生产原型。
Compared with the conventional settlement, planktonic bacteria sampler can be directly contained in unit volume of air bacteria counts, and the impact of air from the environment.
与常规的沉降法相比，浮游细菌采样器能直接得到单位体积空气中所含的菌落数，而且不受环境气流的影响。
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