Whom do you think you are to say that? (随便) You are in no position to judge me. (正式)
<br><img><br><img><br>(保为康n95,56块钱50个)<br><img><br><img><br>(名典上品n95带呼吸阀,99块钱25个)<br><img><br><img><br>(3M的n90带呼吸阀,128元25个)<br><img><br><img><br>(保为康n90,1000个才300多块钱)<br>3M的kn95我也买过,不过订单找不到了,很久以前买的,后来觉得性价比不好就换国产了。(比起现在,3M当年的价格也是良心啊。)