At three sample sites, a 5 cm diameter sediment core was taken with a PVC cylinder to determine nutrient content.

在三个样本的网站，一个直径5厘米的核心是泥沙与聚氯乙烯缸，以确定养分含量。

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Secondly, through the laser craft test, the rational laser honing craft parameters are determined, which are used to process the flat sample and internal-combustion engine cylinder wall.

其次，通过激光工艺试验，研究确定合理的激光珩磨工艺参数，在平板试样和内燃机缸套上进行激光微观造型。

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Objective: To study the effect of giving sample time in determining the content of antibiotic cylinder plate method.

目的：探讨滴样时间对抗生素管碟法含量测定的影响。

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