Forty - five convalescent patients with acute myocardial infarction were studied by dobutamine echocardiography stress test ( EDST ).用超声心动图多巴酚丁胺负荷试验 ( DEST ) 检查了45例急性心肌梗塞恢复期病人.Echocardiography revealed massive right hemo...
为减少磨损,沸腾炉内蒸发管采用加焊半圆形钢板防磨.Semicircle steel sheets were welded on the wall of evaporation pipes in fluidizedroaster for anti - abrasion.实验结果表明,采用蒸发管供油驻涡燃烧室具有良好的点火特性和贫油熄火性能.The results of the experiment indicate that the TV...