日期:2012-04-11 11:29
处理 钢 含量测定 覆层 印制电路板 软钎焊性试验 金属覆层【英文主题词】 DETERMINATION OF CONTENT PRINTED-CIRCUIT BOARDS TIN ALLOYS PROTECTIVE COATINGS COATINGS DESIGNATIONS LEAD-CONTAINING ALLOYS ELECTROPLATING SOLDERABILITY TESTING THICKNESS MEASUREMENT METAL COATINGS ADHESION TESTS STEELS TEST EQUIPMENT CHEMICAL COMPOSITION THICKNESS POROSITY CORROSION TESTS UNDERCOATS HEAT TREATMENT