samplers造句

Bed material samplers, as first developed , may be divided into three types.
最初的河床质取样器有三种类型.

In this paper the performance of two kinds of samplers sintered metal filter is evaluated.
本文介绍温、湿度变化对两种改进型被动式活性炭累积氡采样器吸附性能的影响.