Bed material samplers, as first developed , may be divided into three types.
最初的河床質(zhì)取樣器有三種類型.
辭典例句
In this paper the performance of two kinds of samplers sintered metal filter is evaluated.
本文介紹溫、濕度變化對(duì)兩種改進(jìn)型被動(dòng)式活性炭累積氡采樣器吸附性能的影響.
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