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。
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。
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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