短语词组短语PTH Plated -Through-Hole technology 镀通孔技术PTH Plated Through -Hole 导通孔plated -through hole 金属化孔landless plated -through hole 无连接盘孔Copper -plated-through hole 镀铜通孔Nu -Plated through Hole 非孔化孔 返回 plated through hole