美利体育登录入口官网:IEC 60249-3-3:1991
印制电路用基材 第3部分:印制电路用特殊材料 第3号规范:制造印制电路板中用的永久性聚合物表面覆盖剂(防焊剂)
Base materials for printed circuits; part 3: special materials used in connection with printed circuits; specification 3: permanent polymer coating materials (solder resist) for use in the fabrication of printed boards