A total of 120 sandcrete block samples were produced using cement and sharp sand at different mix ratios of 1:6 or 1:8 mixes, as well as mixes containing partial replacement of sharp sand with fine sand or granite dust at 1:6... OJ Ameh,D. Nwaigwe 被引量: 0发表: 2017年 Influenc...
作者: 孙小亚 摘要: 随着社会进步,人们寿命的增长,口腔疾病患者老年人的比例与日俱增.老年病人常患有多种系统性疾病,尤其是高血压,心脏病等,对这类患者在拔出患牙时有一定的危险性.因此对其术前,术中及术后护理尤为重要.若收缩压(SBP)>180mmHg或舒张压(DBP)>93mmHg,须经过处理使其血压降至<180/93mmHg...