远端壁内扩散可同时或分别沿黏膜层、黏膜下层、内环肌层、外纵肌层和浆膜层进行。
Distal intramural spread could be via mucosa, submucosa, inner circular muscular layer, outer longitudinal muscular layer or serosa, either separately or concomitantly.
缆芯外挤上一层聚乙烯内护套，双面涂塑钢带(psp)纵包后挤制聚乙烯护套成缆。
After the PSP is longitudinally applied over the inner sheath, the cable is completed with a PE outer sheath.
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