This list is incomplete you can help by expanding it. This is a list of ASTM International standards. Standard designations usually consist of a letter prefix and a sequentially assigned number. This may optionally be followed by a dash and the last two digits of the year in which the standard was adopted. Prefix letters correspond to the .
Electrostatic cotton and nonwoven, meltblown fabric are the conventional materials used in disposible masks, but are not readily available during the COVID19 epidemic. A new type of filter, a washable electrostatic cotton filter, has been reported since the start of the pandemic it is said to withstand repeated washing and folding. It is made of electrospun nanofibers flanking insulating .
A respirator is designed to protect the wearer from inhaling harmful dusts, fumes, vapors, and/or gases. Respirators come in a wide range of types and sizes used by the military, private industry, and the public. Respirators range from cheaper, singleuse, disposable masks to reusable models with
The Murasaki Shikibu Diary Emaki , Murasaki Shikibu nikki emaki is a mid13th century emaki, a Japanese picture scroll, inspired by the private diary of Murasaki Shikibu, ladyinwaiting at the 10th/11th centuries Heian court and author of The Tale of Genji.This emaki belongs to the classical style of Japanese painting known as yamatoe and revives the iconography of the .
Dancers wearing qatu masks in the initiation rites of Maewo , Vanuatu, from The Melanesians 1891 by Robert Codrington. The Spanish philologist Lorenzo Hervs y Panduro later devoted a large part of his Idea dell Universo 17781787 to the establishment of a family linking the Malaysian Peninsula, the Maldives, Madagascar, the Sunda Islands, Moluccas, the Philippines, and the .
Anaesthesia masks: An anaesthetic machine is a medical device used to generate and mix a fresh gas flow of medical gases and inhalational anaesthetic agents for the purpose of inducing and maintaining anaesthesia. For some applications an orinasal mask may be used to deliver the gas. The machine is commonly used together with a mechanical ventilator, breathing system, suction equipment, and .
Blue, Surgical N95 healthcare particulate respirator and surgical mask cleared by NIOSH and FDA. White, disposable Standard N95 filtering facepiece respirator. A halfface elastomeric airpurifying respirator. This kind of respirator is reusable, with the filters being replaced periodically. A respirator is a device designed to protect the wearer from inhaling hazardous atmospheres, including .
Surgical masks are pleated but also made from nonspun plastic fibres. The N95 mask 95 particles filtered is equivalent to a P2 mask particles down to 2.5 micron , are moulded into a cup shape, and made out of nonspun plastic fibres. Hedley 05:07, 2 April 2020 UTC
Fashion in the period 16001650 in Western European clothing is characterized by the disappearance of the ruff in favour of broad lace or linen collars.Waistlines rose through the period for both men and women. Other notable fashions included full, slashed sleeves and tall or broad hats with brims. For men, hose disappeared in favour of breeches.
A diving regulator is a pressure regulator that reduces pressurized breathing gas to ambient pressure and delivers it to the diver. The gas may be air or one of a variety of specially blended breathing gases. The gas may be supplied from a scuba cylinder carried by the diver or via a hose from a compressor or highpressure storage cylinders at the surface in surfacesupplied diving. A gas .