论文部分内容阅读
剪阀
【出 处】
：
设备管理与维修
【发表日期】
：
1999年5期
其他文献
In embankments and earth dams, the granular filter used to protect the base soil from being eroded by the fluid flow is a major safety device. In this paper, th
Objective:This overview seeked to bring together the microRNA (miRNA) researches on biogenesis and bio-function in these areas of clinical diagnosis and therapy
Objective:To review the natural history and growth kinetics of small renal masses (SRMs).Data Sources:The literature concing natural history and growth kinetics
目的探讨研究不同比重的布比卡因的临床效果与安全性。方法选择ASAⅠ-Ⅱ级的下腹部及下肢手术病例80例，随机分为重比重蛛网膜下腔阻滞麻醉组（A组，40例）和等比重蛛网膜下腔阻滞麻
Conditional Knockout of Src Homology 2 Domain-containing Protein Tyrosine Phosphatase-2 in Myeloid C
Background:Src homology 2 domain-containing protein tyrosine phosphatase-2 (SHP-2) is a kind of intracellular protein tyrosine phosphatase.Studies have revealed
为了满足在一个系统中使用多码率低密度奇偶校验(LDPC)码字的需求,设计了一个多码率准循环LDPC(QC-LDPC)码编码器;按照功能,将编码器分成输入缓存单元(ISU)、生成矩阵存储单
可观测性分析是无源定位与跟踪系统的前提和基础。由于卫星运动系统方程是状态变量的隐函数形式,以及观测方程的非线性,使得对卫星目标仅测角无源定位的可观测性研究难度较大
The mechanical energy equation is a fundamental equation of a 1-D mathematical model in Hydraulics and Engineering Fluid Mechanics. This equation for the total
With the rapid development of high dam projects within China, the dragon-drop-tail spillway tunnel is introduced and widely used. In view of the high water head