Because of their simplicity, bipolar lead systems were the first to be used in clinical electrocardiography.因为它们简单, 双极导联最先用于临床心电图学.Objective To study electrocardiography diagnosis of ischemia in patients with ventricular...
石油的储集是受从渗透到不渗透的岩相横向变化控制的.The accumulation of oilis governed by lateral changes from permeable to impermeable facies.妈妈教我渗透的科学原理.My mother taught me about the science of OSMOSIS.水冷式均质密封结构,克服了普通密封渗透的难题.Water - cool homogen...