单词:liquid ring vacuum pump
单词:liquid ring vacuum pump 相关文章
Last time we talked about how astronauts eat and drink under weightless conditions in space. Today we'll cover the next question kids love to ask-how do astronauts go to the bathroom in space? It may sound silly, but it's really a good question, beca
It may sound silly, but its really a good question, because weightlessness does make a visit to the latrine a tricky proposition. Weightlessness poses two main problems in the bathroom. The first is that an astronaut could drift away from the bowl at
A new survey shows you're not paying any more the gas pumped than you were three weeks ago. Good news since late May. Motorists aren't paying any more for gas, but not paying any less either, accordin
今天要学的一个词是:pump。pump,Pump一般是指泵,或抽水机。可是今天讲的pump是指汽车加油站的泵。英国石油公司宣布停止在阿拉斯加的石油开采,《洛杉矶时报》的标题说:Oilfield Closure t
CAPE CANAVERAL Two American astronauts will venture outside the International Space Station Monday to stow a failed coolant pump and extend the outpost's Canadian railway. Wearing protective spacesuits in a deadly vacuum(真空) environment, Stephen
Next time you spill a little, let the coffee dry before wiping it up. Youll notice that after it dries there is a darkish ring around the very edge of the spill, whereas the middle disappears almost entirely. Whats going on here? Robert Deegan and Sy