M?t trong nh?ng l?i ích l?n nh?t c?a vi?c tham gia khuy?n m?i là t?ng c? h?i th?ng cho ng??i ch?i.Think about the base with the stationary manual just to the still left ofthe capstan shaft. If you see black, then the “rabbet,”The underside ledge together the circumference of the head drum, is alsolikely being contaminated. Figure 1a zooms in