该技术利用光时域反射(otdr:optical time domain re flectometry)原理、激光喇曼光谱原理,经波分复用器、光电检测器等对采集的温度信息进行放大并将温度信息实时地计算出来...),1999,23(1):64-69dakin j p,pratt d j.temperature distribution measurement using ram an ratio thermometry.spie
replacing smaller units with big ones" policy and actively develop high-capacity, sophisticated-parameter...and ledger management system. provide routine checks on various equipment, electrical lines, control meters
replacing smaller units with big ones" policy and actively develop high-capacity, sophisticated-parameter...and ledger management system. provide routine checks on various equipment, electrical lines, control meters
巴西只有一座初级铜生产商--caraiba metais sa,目前该厂每年可生产200,000吨左右铜,需求增长的部分需要进口来满足。”铜广泛应用于电线和电缆等基础工业中。...尽管国内成本上升,caraiba metais2月称,为迎合国内市场日益繁荣的需求,该公司将最终将通过长期的扩张计划,并投资6.30亿巴西雷亚尔(3.7951亿美元)使铜冶炼厂的年产能从当前的230000