SY-C005I Cheap Neonatal Infant Multi-parameter Cardiac Monitor Product Description ECG 5 Leads RA, LA, LL, RL, V Lead mode I,II,III,AVR,AVL,AVF,V Gain 1.25mm/mV, 2.5mm/mV, 5.0mm/mV, 10mm/mV, 20mm/mV Sweep speed 6.25mm/s, 12.5mm/s, 25mm/s, 50mm/s Bran...
SY-C028 Sunny Medical Equipment Portable ICU Biphasic Defibrillator Monitor Feature of ICU biphasic defibrillator monitor: ECG ECG lead: I,II,III,Avr,Avl,Avf,V1~V6 S-T segment analysis :-2.0~2.0mv Protegtion:Withstand 4000vAc/50Hz voltage in isolation and ...
在均匀致密完整的围岩中，受到初始的垂直应力σv=10MPa和水平应力σh=15MPa。在该岩体中进行圆形硐室开挖，如下图所示，R0=5m。假设在开挖完成后围岩依然处于弹性状态，请问在硐顶岩壁处（θ=90°，R0=5m）的最大主应力为