LST EN IEC 60068-2-20:2021 環境測試 第 2-20 部分：測試 測試 Ta 和 Tb：帶引線器件的可焊性和耐焊接熱測試方法（IEC 60068-2-20:2021）
Environmental testing - Part 2-20: Tests - Test Ta and Tb: Test methods for solderability and resistance to soldering heat of devices with leads (IEC 60068-2-20:2021)