Somegasesusedare notnecessarilytoxic,butcanbeheavierthanair,thusdisplacingoxygenandcreatingabreathingsafetyhazard. 测试中使用的某些气体未必有毒,但可能比空气重,因此可能取代氧气并带来安全呼吸危险。 q.sohu.com 7. Therefore, aprecisedefinitionoftheaircraftis:thereisapower-drivenaircraft,fixedwingaircraftandishea...
Dispersion of heavier-than-air gases in the atmosphere Review of the organisation and management of the HSE field trials 1982/84D.G Wilde
This corrosive, colorless compound is a gas under standard conditions, with a density of about 13 g/L (roughly 11 times heavier than air.); WF6 is one of the heaviest known gases under standard conditions. 此腐蚀性,无色化合物是在标准条件下的气体,具有约13克/升(比空气重的大致11倍。 )...
air (eə) noun 1. the mixture of gases we breathe; the atmosphere. Mountain air is pure.aire 2. the space above the ground; the sky. Birds fly through the air.aire 3. appearance. The house had an air of neglect.aspecto 4. a tune. She played a simple air on the piano.aire ve...
百度试题 结果1 题目 重于空气的气体或蒸气是指相对密度大于()的气体或蒸气Gases or vapors heavier than air are those with a relative density greater than () A. 1.0 B. 1.2 C. 1.5 D. 2.0 相关知识点: 试题来源: 解析 B 反馈 收藏 ...
because propaneisheavierthanair and will settle on the ground. graco.com graco.com 一定要闻接近 地面的地方,因为丙烷比空气重并沉在地上。 graco.com graco.com If the pump does not prime properlywithheavierfluids, increase air pressure to the ram. ...
Method for the recovery of hydrogen and carbon monoxide from a feed gas mixture containing hydrogen, carbon monoxide, methane, and hydrocarbons heavier than methane. The method comprises utilizing
when it was that builders began making houses and offices which did not waste energy. To do this they built buildings that 45 the flow of air between inside and outside. They also began using man-made building materials. These materials are now known to 46 harmful gases. As the problem ...
The densities of the contaminant gases were 0, 25 and 50% greater than the air density. Calculations were performed with the contaminant injection source upstream and downstream of the obstacle.Use of the pressure gradient model reduced the size of the dense gas cloud by as much as 12%. The...
A restriction 78 provided in the air system is smaller in diameter than nozzle 72. When the nozzle 72 is covered by flapper valve asembly 66, back pressure builds up in the air system and this, through bellows 62, rebalances the system, the pressure being measured as an indication of the...