SA-214/SA-214M (Identical with ASTM Specification A214/A214M-90a)1.Scope 1.1This specification covers minimum-wall- thickness,electric-resistance-welded,carbon steel tubes to be used for heat exchangers,condensers,and similar heat-transfer apparatus.1.2The tubing sizes usually furnished to...
SPECIFICATION FOR ELECTRIC-RESISTANCE-WELDED CARBON STEEL HEAT-EXCHANGER ANDCONDENSER TUBESSA-214/SA-214M(Identical with ASTM Specification A 214/A 214M-90a)1.Scope1.1Thisspecificationcoversminimum-wall-thickness, electric-resistance-welded, carbon steel tubesto be used for heat exchangers, condensers,...
Innervation of Histaminergic Tuberomammillary Neurons by GABAergic and Galaninergic Neurons in the Ventrolateral Preoptic Nucleus of the Rat We recently found that sleep-active neurons in the ventrolateral preoptic nucleus (VLPO) provide a major input to the TMN, but the specificity of this ... ...
Gartner手机分析师吕俊宽则认为,华为的HMS很难被海外市场接受,因为海外用户习惯了谷歌的应用,想象一下用户要放弃Gmail、GoogleMap、GooglePhoto、Youtube,华为需要说服用户替换的应用太多了。 鉴于重重困难,研究机构StrategyAnalytics也给了比较消极的预测:2020年华为智能手机的海外销量会同比下滑超过50%,在西欧的下滑幅度会...