<div>　　公制经纬密单位：根/10cm &nbsp; &nbsp; &nbsp;</div><div>&nbsp; &nbsp; 英制经纬密单位：根/in公制密度=英制经密×3.937</div><div>&nbsp; &nbsp;<img src="http://dayaotex-img.gz.bcebos.com/article/fffspic/pbzs03.png"></div>