安装垫面和垫位置尺寸与飞轮水平中心线上方和下方垂直垫的水平和垂直中心线有关（“高”和“低”垫）。螺纹孔的直径、位置和尺寸。固定在安装垫上形成发动机支撑臂的支架尺寸。交叉引用:BS 350BS 1580BS 1768BS 2693BS 3092

Mounting pad face and pad location dimensions with respect to horizontal and vertical centre lines of vertical pads located above and below the flywheel horizontal centre line ('high' and 'low' pads). Diameters, location dimensions of tapped holes. Dimensions of brackets which, secured to mounting pads, form engine support arms.Cross References:BS 350BS 1580BS 1768BS 2693BS 3092