Translation of "upper part" into Chinese

he upper part of the tube remaining in the closing device is counted as one fragment

留在闭合装置中的钢管上半部分算是一片。

Within the upper part of the section, on the seabed surface, a thin (1-10 cm) geochemical active layer occurs with nodules on it.

在该区上层部分,在海底表层,出现了一块薄薄的(1-10厘米)地球化学活性层,上面有结核。