pinholes

The formation mechanism of orange valvule-like pinhole in rolled aluminium foil was investigated by using optical microscopy,scanning electron microscopy,and energy dispersion X-ray spectrum.

利用光学显微镜、扫描电镜、能谱试验手段对铝箔中"桔瓣"形针形成的原因进行了。

Pinhole. A short unwelded area in the weld line extending through the entire pipe so that fluid will leak out through the area very slowly.

针。焊缝线上位焊接的、贯穿管子整个壁厚的细，可导致流体从慢漏出。