论文部分内容阅读
烯烃部裂解炉翅片管泄漏原因分析
【出 处】
：
石油化工设备
【发表日期】
：
2007年z1期
其他文献
髋关节发育异常(developmental dysplasia of the hip,DDH)是儿童期最常见的骨骼肌肉系统疾病.其特点是在患儿出生时,股骨头与髋臼失去正常的对位关系,多数表现为股骨头部分脱出髋臼,少数股骨头全部脱出髋臼;病变常累及髋臼、股骨头、关节囊和髋关节周围的韧带和肌肉.由于早期临床表现不明显,特别是在新生儿期,容易漏诊而延误治疗.大量研究表明头臼同心是髋关节发育的先决条件.婴
Seismic processing characterizing thickness and borders of thin inter-beds has gradually evolved from post-stack migration to pre-stack migration,and the latter
Rock fragmentation mechanisms and an experimental study of drilling tools during high-frequency harm
Resonance drilling is a new technology,still at the laboratory stage.It has great potential to improve rock fragmentation efficiency.We analyzed the amplitude-f
There are favorable exploration prospects in igneous rock reservoirs.However,problems of borehole instability occur frequently during drilling igneous formation
A series of experiments were performed to determine rock mechanical parameters related to hydraulic fracturing of coal.The effect of confining pressure and pore
The characteristics of ultralow permeability reservoirs changed after waterflooding.Thin-section analysis and scanning electron microscopy(SEM) of core samples