basis metal meaning in Chinese

心材(包层产品之中心金属)

Non - conductive coatings on non - magnetic basis metals - measurement of coating thickness - eddy current
非磁性基体金属上非导电覆盖层覆盖层厚度测量涡流法
Standard test method for measurement of coating thicknesses by the magnetic method : nonmagnetic coatings on magnetic basis metals
用磁性法测量磁性基底金属的非磁性镀层厚度的标准试验方法
Standard test method for measurement of thickness of anodic coatings on aluminum and of other nonconductive coatings on nonmagnetic basis metals with eddy - current instruments
用涡流仪器测量铝阳极镀层及其它非磁性基底金属绝缘镀层的厚度标准试验方法