螺旋式聲測管

螺旋式聲測管：gangguandeyiduandaiyouwaisiguanjian
，lingyiduanyoukezhuandongdeneisi，zhongjianyongmifengquanjinxingmifeng。cizhonglianjiexingshishiyongyugezhonghoubishengceguandelianjie，kegenjuxiangmudezhuangjijigangjinchangdushedingshengceguanchangdujinxingjiagongpeisong，xianchanglianjiejianbiankuaijie。