surface pinholes

英 [ˈsɜːfɪs ˈpɪnhəʊlz]

美 [ˈsɜːrfɪs ˈpɪnˌhoʊlz]

网络表面针孔; 表面针孔(铸疵)

When bubbles of hydrogen gas produced in hydrogen evolution adhere to the cathode surface, electrodepositing is prevented, pinholes and pits results.
伴随金属沉积发生的析氢反应产生氢气泡吸附在阴极表面，会导致针孔和麻点的产生；
Surface pinholes caused by gas formed at the mould surface.
因钢锭模表面生成气体而形成的表面针孔。
Among others, surface defects such as pinholes, holes and stains appear during the production of PM components, especially after sintering.
烧结钢部件在生产过程中，尤其是烧结之后其表面有时会出现针孔、孔洞及斑痕等缺陷。
Thus the inner structure of the wheel is resin-metal combining binder, the surface is resin binder with pinholes.
这样砂轮的内部是树脂-金属复合结合剂结构，表层是有气孔的树脂结合剂结构。
It was observed that the surface of wheat-straw became rougher and there were lots of pinholes in the cell wall by scanning the enzyme-pretreated straw with electricity microscope ( SEM).
经扫描电镜观察可看出经过木聚糖酶预处理后麦秸表面变得粗糙，细胞壁上有很多小孔。