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.

辞典例句

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.

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