底皮步骤1、把军鼓胜倒置在地板上，鼓腔下面垫上毛毯或软布。步骤2、把军鼓底皮蒙在鼓腔上。步骤3、把底鼓圈在鼓皮上放好。注意鼓圈上穿响弦的长方形孔要与绷弦器对齐。步骤4、把张力杆穿过鼓圈，用拇指和食指把张力杆轻轻拧入张力托。步骤5、用手掌根部用力向下压鼓圈并继续 Subcutaneous step 1, the snare drum upside down on the floor, under the drum cavity padded blankets or soft cloth. Step 2, the snare drum at the end of skin drum cavity. Step 3, put the bottom drum ring on the drum skin. Note that the oblong holes on the drum ring should be aligned with the strings. Step 4, the tension bar through the drum, with the thumb and index finger to gently tighten the tension bar care. Step 5, with the palm root force down the drum and continue