論經濟,3200+3744係唔係最抵單咀嘅資料!!!
3744可以防到94%
http://www.ring-in.com.tw/personal/detail/1177
呢個網話3744係到P2 level
https://www.health.nsw.gov.au/environment/factsheets/Pages/face-mask.aspx
P2 即係 N95 level
所以按道理單咀配
3744k + 3700
or
7711 + 774
都應該得嘅⋯⋯
想問台灣寄過嚟嘅話可以用咩方法?
Sf得唔得呢