covid-19面罩

Mask for who needs saving medical masks. Primary Filter material is cutting medical mask, cutting size 50mm*50mm. You can adjust the Z axis scale of Mask_Cover for proper tightening. It would be better sealing if round the edge with rubbe silicon stripping. Tissue or toilet Paper could be used as filter material in an emergence, better than nothing. 針對(duì)口罩材質(zhì)節(jié)約使用設(shè)計(jì)的口鼻覆蓋式口罩， 建議邊緣可加黏橡膠或矽膠膠條，增加氣密性。 若物資缺乏緊急時(shí)刻也可用衛(wèi)生紙廁紙或可透氣的材質(zhì)來做使用。 內(nèi)蓋的Z軸厚度百分比調(diào)整，可以調(diào)整出適合的緊配度。