Estimates are that 60-70% of printed wiring boards are tin-lead solder coated, usually by hot air solder leveling (HASL).是什么意思_Estimates are that 60-70% of printed wiring boards are tin-lead solder coated, usually by hot air solder leveling (HASL).在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句