Ventilation: positive downdraft exhaust ventilation should be provided to maintain vapor concentration below TLV.
通風(fēng): 為了使氣體聚集程度維持在閥極限值之下,應(yīng)提供通暢的向下棋流排氣通風(fēng)設(shè)施.
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Beijing Cherokee engine uses Cart YFA carburetor which is single barrel, downdraft carburetor with triple venturi.
北京切諾基發(fā)動(dòng)機(jī)采用卡特YFA單腔 、 下吸式、三重喉管化油器.
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When you have an economic downdraft like this, that same flexibility can be a severe detriment.
當(dāng)你遭遇這種規(guī)模的經(jīng)濟(jì)衰退時(shí), 同樣的彈性可能就會(huì)非常不利.
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