防尘盖土网需要2针好还是3针好？

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　　1、SHUANGZHENFUGAITUWANG

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　　2、SANZHENFUGAITUWANG

　　CAIYONGGAOMIDUJUYIXIZUOWEIYUANCAILIAO，TONGGUOTESHUJISHUBIANZHICHENGWANGLUO，YULIANGZHENXIANGBIJIANGGENGJIAMISHI，HAIKEQIDAOFANGCHEN、FANGFENG、FANGCHENDEZUOYONG，BINGKEZHIJIEFUGAIZAIMEIDUIZHONGJIEJUEWENTI。