bottom centre,bottom dead centre,lower dead center;lower dead point是什么意思

用法例句

Disposal of runner band seal damage of Unit 5 in Guangzhou Pumped Storage Power Station;

广蓄电厂5号机下止漏环烧损原因分析及处理

[Objective] To study the effect of anaesthesia depth on endoscopic hemostasia for upper gastrointestinal bleeding.

方法73例上消化道出血患者完全随机分为A、B组,2组均进行异丙酚静脉后实施内镜下止血治疗,其中A组镇静Ramsayscale为3～4分,B组镇静Ramsayscale为5～6分。