How do you shape the different sections, such as, bulb plates, angle bars, and other stiffeners. someone who tunes pianos. 型材怎样加工呢,像球扁钢,角钢和一些加强材?一个给钢琴调音的人。
Guide the bulb into the sheetmetal holder at an angle and press it to the side. 以一定角度将灯泡导入钢板架,并将其压向一侧。