短语词组短语vent -hole 指孔cylinder vent hole 油缸放气孔die vent hole 摸套shape of vent hole 开孔形状Vent holeand overflow hole 排气溢流孔Shell vent hole 罐壁通气孔VH Vent Hole 排气孔rotor copper vent hole 转子铜线通风孔air vent hole 空气孔;氛围孔;气氛孔 返回 vent hole