The volunteers kept a record of everything they ate for a week.志愿者记录下他们一周所吃的所有食物。Volunteers constitute more than 95% of The Center's work force.该中心95%以上的工作人员是志愿者.Twelve potential vaccines are currently being tested ...
箱型梁内角部焊缝所用的电焊条为E70.The box corner welds were made with E 70 electrodes.本文研究了无造渣剂等矿石粉的耐磨堆焊电焊条.An overlay welding electrode without mineral powder as, slag forming medium, etc.经营范围: 乙炔氧气、电焊条零售.Scope: Acetylene oxygen weldi...