sectional specification:single and double sided printed boards with platedthrough holess有: 5年 fifteen years金属: metals genus化: change; turn; transform孔: hole; opening; aperture单: singular number fate; destin ...下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:有金属化孔单双面印制板分规范,即可在微信中查询翻译