Ventilation: positive downdraft exhaust ventilation should be provided to maintain vapor concentration below TLV.通风: 为了使气体聚集程度维持在阀极限值之下,应提供通畅的向下棋流排气通风设施.Beijing Cherokee engine uses Cart YFA carburetor which is single ba...
Hence a good absorber is a good emitter, and a poor absorber is a poor emitter.所以良吸收体就是良发射体, 劣吸收体就是劣发射体.We have been considering the transistor with a current fed into the emitter.我们所研究的晶体管都是把电流馈入发射极.The base region is a...
These things belong in a different classification.这些东西属于不同的类别.The physical world was and still is indifferent to the mathematicians'classification.物理界过去和现在都是从不关心数学家们的分类的.This classification is the analogy of our pre...