half mask

1. Barely half of the respondents claimed they bother to wear a mask in public anymore if they have a cold or the flu.
   只有一半的受访者表示，他们会在伤风感冒时在公共场所戴口罩。
2. Respiratory protective devices-Compressed air line breathing apparatus for use with a full face mask, half mask or a mouthpiece assembly-Requirements, testing, marking.
   呼吸保护装置。与全罩式面罩、半罩式面罩或口罩一起使用的压缩空气导管呼吸装置。要求、试验和标志。
3. A loose hooded cloak worn with a half mask as part of a masquerade costume.
   和作为舞会服装一部分的半截面罩一起穿戴的、有宽松头巾的斗篷。
4. CONCLUSION: Multiple vitamin E, C, B facial mask is efficacious for the treatment of acne and more than half study subjects experienced in none adverse reaction. Multiple vitamin E, C, B facial mask possesses an alternate therapy in acne vulgaris.
   结论：维生素E，C，B组合物面膜治疗痤疮有效，超过半数的受试者无不良反应发生，可作为传统治疗寻常痤疮药物的替代。
5. Abiological protective respirator with equal protection level of the half face mask
   一种达到面具防护水平的生物防护口罩

noun

1. a mask covering the upper part of the face but with holes for the eyes

   Synonym:    dominoeye mask