gas mask

n. A respirator that contains a chemical air filter and is worn over the face as protection against toxic gases and aerosols.

gas mask

n (Military) a mask fitted with a chemical filter to enable the wearer to breathe air free of poisonous or corrosive gases: used for military or industrial purposes. Also called (in Britain): respirator

gas′ mask`

n. a masklike device that filters air through charcoal and chemicals to protect the wearer against noxious gases. [1910–15]

Translations

防毒面具

gas

(gӕs) noun1. a substance like air. Oxygen is a gas.气体2. any gas which is used for heating, cooking etc. 可燃气3. a gas which is used by dentists as an anaesthetic. （麻醉用的）笑气 4. a poisonous or irritating gas used in war etc. The police used tear gas to control the riot.毒气 verb – past tense, past participle gassed – to poison or kill (a person or animal) with gas. He was gassed during World War I.用毒气杀伤gaseous (ˈgӕsiəs) adjective of or like (a) gas. a gaseous substance.气体的ˈgassy adjective full of gas. gassy lemonade.充满气体的ˈgassiness noun充满气体状态gas chamber a room in which people are killed by means of gas. Many people were sent to the gas chamber in World War II.毒气室gas mask something which is used to cover the face to prevent a person breathing poisonous gas. 防毒面具gas meter an instrument which measures the amount of gas which is used. 煤气表gasoline, gasolene (ˈgӕsəliːn) noun (American. also gas) petrol.汽油gas station (American) a petrol station. 加油站ˈgasworks noun singular a place where gas is made. The gasworks is rather an ugly building.煤气厂

gas mask

gas mask,

face covering or device used to protect the wearer from injurious gases and other noxious materials by filtering and purifying inhaled air. In addition to military use (see chemical warfarechemical warfare,
employment in war of incendiaries, poison gases, and other chemical substances. Ancient armies attacking or defending fortified cities threw burning oil and fireballs. A primitive type of flamethrower was employed as early as the 5th cent. B.C.
..... Click the link for more information. ), gas masks are employed in mining, in industrial chemistry, and by firemen and rescue squads. The gas mask consists essentially of a face cover with two eyepieces and a mouthpiece that communicates with a canister containing a filter. The filter absorbs noxious gases as they pass through the canister to the mouth. The face cover also has a one-way outlet valve for exhaled air. See poison gaspoison gas,
any of various gases sometimes used in warfare or riot control because of their poisonous or corrosive nature. These gases may be roughly grouped according to the portal of entry into the body and their physiological effects.
..... Click the link for more information. .

Gas Mask

a device for protecting the respiratory organs, eyes, and face of a person against toxic and radioactive substances, bacterial agents, and other harmful impurities in the air in the form of vapors, gases, or aerosols. Gas masks are classified by their method of protection as filtering masks, whose action is based on decontamination or filtration of harmful impurities from the air inspired, and oxygen masks, which completely isolate the respiratory organs from the environment (the air breathed is regenerated in the cartridge of the gas mask).

Filtration gas masks in the form of multilayered gauze bandages soaked with special solutions for protection against chlorine and phosgene appeared during World War I, but they were not effective against other toxic agents. In 1915 the Russian chemist N. D. Zelinskii invented the world’s first dry filtering gas mask with activated charcoal and a rubber mask. In 1916 this gas mask was adopted by the Russian and Allied armies. Dry gas masks soon appeared in the armies of other countries. The present-day filtering gas mask consists of a canister, a facepiece (helmet), and a carrier (pouch). As it is inspired, the contaminated air enters the canister. Aerosols are removed in the aerosol filter, and vapors and gases are removed in the layer (chemical absorber) of activated charcoal. The air decontaminated in the canister passes through the connecting tube under the facepiece of the mask. The facepiece consists of a rubber helmet-mask with goggles and a valve unit. The gas mask set includes means to prevent the goggles from steaming up (a special pencil and an antisweat film). In the winter, insulating packing is mounted on the eyepiece rings of the helmet-mask. The mask can be used for an extended period of time and weighs about 2 kg.

Isolation-type oxygen masks are used in cases where filtering masks do not provide protection, for example, where there is a deficiency of oxygen in the environment. A distinction is made between oxygen masks based on the use of chemicals and those using compressed oxygen in containers. In the first kind, air that is exhaled enters the cartridge where water vapor and carbon dioxide are absorbed and oxygen is given off; the air then passes into the breathing bag. When inspired, the air passes again from the bag through the cartridge and enters at the bottom of the facepiece. The process is repeated for each breathing cycle. This kind of gas mask can be used from one to three hours and weighs 4–4.5 kg. In the isolation-type mask based on the use of compressed oxygen, when the exhaled air enters the cartridge the carbon dioxide is removed and the air passes into the breathing bag, to which oxygen from the bottle is fed simultaneously. When inspired, the oxygen-enriched air enters at the bottom of the facepiece of the mask. This kind of mask can be used for one or two hours and weighs roughly 9 kg.

M. I. PROSTOMOLOTOV

gas mask

[′gas ‚mask] (engineering) A device to protect the eyes and respiratory tract from noxious gases, vapors, and aerosols, by removing contamination with a filter and a bed of adsorbent material.

单词	gas mask
释义	gas mask gas mask n. A respirator that contains a chemical air filter and is worn over the face as protection against toxic gases and aerosols. gas mask n (Military) a mask fitted with a chemical filter to enable the wearer to breathe air free of poisonous or corrosive gases: used for military or industrial purposes. Also called (in Britain): respirator gas′ mask` n. a masklike device that filters air through charcoal and chemicals to protect the wearer against noxious gases. [1910–15] Translations 防毒面具 gas (gӕs) noun1. a substance like air. Oxygen is a gas. 氣體气体2. any gas which is used for heating, cooking etc. 燃氣可燃气3. a gas which is used by dentists as an anaesthetic. 牙醫用的麻醉氣體（麻醉用的）笑气 4. a poisonous or irritating gas used in war etc. The police used tear gas to control the riot. 毒氣毒气 verb – past tense, past participle gassed – to poison or kill (a person or animal) with gas. He was gassed during World War I. 用毒氣殺害用毒气杀伤gaseous (ˈgӕsiəs) adjective of or like (a) gas. a gaseous substance. 氣體的气体的ˈgassy adjective full of gas. gassy lemonade. 充滿氣體的充满气体的ˈgassiness noun 充滿氣體充满气体状态gas chamber a room in which people are killed by means of gas. Many people were sent to the gas chamber in World War II. 毒氣室毒气室gas mask something which is used to cover the face to prevent a person breathing poisonous gas. 防毒面具防毒面具gas meter an instrument which measures the amount of gas which is used. 瓦斯錶煤气表gasoline, gasolene (ˈgӕsəliːn) noun (American. also gas) petrol. 汽油汽油gas station (American) a petrol station. 加油站加油站ˈgasworks noun singular a place where gas is made. The gasworks is rather an ugly building. 瓦斯廠煤气厂 gas mask gas mask, face covering or device used to protect the wearer from injurious gases and other noxious materials by filtering and purifying inhaled air. In addition to military use (see chemical warfarechemical warfare, employment in war of incendiaries, poison gases, and other chemical substances. Ancient armies attacking or defending fortified cities threw burning oil and fireballs. A primitive type of flamethrower was employed as early as the 5th cent. B.C. ..... Click the link for more information. ), gas masks are employed in mining, in industrial chemistry, and by firemen and rescue squads. The gas mask consists essentially of a face cover with two eyepieces and a mouthpiece that communicates with a canister containing a filter. The filter absorbs noxious gases as they pass through the canister to the mouth. The face cover also has a one-way outlet valve for exhaled air. See poison gaspoison gas, any of various gases sometimes used in warfare or riot control because of their poisonous or corrosive nature. These gases may be roughly grouped according to the portal of entry into the body and their physiological effects. ..... Click the link for more information. . Gas Mask a device for protecting the respiratory organs, eyes, and face of a person against toxic and radioactive substances, bacterial agents, and other harmful impurities in the air in the form of vapors, gases, or aerosols. Gas masks are classified by their method of protection as filtering masks, whose action is based on decontamination or filtration of harmful impurities from the air inspired, and oxygen masks, which completely isolate the respiratory organs from the environment (the air breathed is regenerated in the cartridge of the gas mask). Filtration gas masks in the form of multilayered gauze bandages soaked with special solutions for protection against chlorine and phosgene appeared during World War I, but they were not effective against other toxic agents. In 1915 the Russian chemist N. D. Zelinskii invented the world’s first dry filtering gas mask with activated charcoal and a rubber mask. In 1916 this gas mask was adopted by the Russian and Allied armies. Dry gas masks soon appeared in the armies of other countries. The present-day filtering gas mask consists of a canister, a facepiece (helmet), and a carrier (pouch). As it is inspired, the contaminated air enters the canister. Aerosols are removed in the aerosol filter, and vapors and gases are removed in the layer (chemical absorber) of activated charcoal. The air decontaminated in the canister passes through the connecting tube under the facepiece of the mask. The facepiece consists of a rubber helmet-mask with goggles and a valve unit. The gas mask set includes means to prevent the goggles from steaming up (a special pencil and an antisweat film). In the winter, insulating packing is mounted on the eyepiece rings of the helmet-mask. The mask can be used for an extended period of time and weighs about 2 kg. Isolation-type oxygen masks are used in cases where filtering masks do not provide protection, for example, where there is a deficiency of oxygen in the environment. A distinction is made between oxygen masks based on the use of chemicals and those using compressed oxygen in containers. In the first kind, air that is exhaled enters the cartridge where water vapor and carbon dioxide are absorbed and oxygen is given off; the air then passes into the breathing bag. When inspired, the air passes again from the bag through the cartridge and enters at the bottom of the facepiece. The process is repeated for each breathing cycle. This kind of gas mask can be used from one to three hours and weighs 4–4.5 kg. In the isolation-type mask based on the use of compressed oxygen, when the exhaled air enters the cartridge the carbon dioxide is removed and the air passes into the breathing bag, to which oxygen from the bottle is fed simultaneously. When inspired, the oxygen-enriched air enters at the bottom of the facepiece of the mask. This kind of mask can be used for one or two hours and weighs roughly 9 kg. M. I. PROSTOMOLOTOV gas mask [′gas ‚mask] (engineering) A device to protect the eyes and respiratory tract from noxious gases, vapors, and aerosols, by removing contamination with a filter and a bed of adsorbent material. gas mask gas mask (gas mask) A device worn over the nose and mouth as protection against airborne toxic gases. LegalSeeGasSee GM See GMThesaurusSeegas
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