bgasBNC²³⁶²¹³⁺¹ 基本例句 Boys and Girls Aid Society 少年援助协会原型bga的复数 With extensive application of fine pitch QFPs and BGAs, precisely and accurately determining and adjusting PCB's temperature profile is necessary to promote solder quality. 目前由于 QFP和 BGA等器件的大量采用,如何准确地测试、调整印制板温度曲线是提高焊接质量的关键。 chemyq