Some parameters, such as perimeter, diameter, is very important to quality of spiral welded pipe.
螺旋管的周长、直径等参数对于螺旋管的质量非常重要。
The results showed that the mean cell area. nuclear area. nucleocytoplasmic rato, nuclear perimeter and its diameter of breast carcinoma were larger than those of benign diseases.
结果显示：乳腺癌平均细胞面积、核面积、核浆比例、核直径及周长均大于各良性疾病。
All groups were sacrificed at tha 7th day after operation and get the basilar arteries (BA) for HE stain. then the perimeter of inside diameter and the thickness of vessel wall were measured.
以上各组分别于第一次手术后7天灌注处死，取基底动脉（BA）行HE染色，测量其内径周长和管壁厚度；
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