三座标测量机
coordinate measuring system
三坐标增量测量法
CMM incremental measurement method
三坐标测量机CMM
coordinate measuring machines CMM
散均分子量
Number average molecular weight
三轴坐标量床
coordinate measuring machine
三相统一电能质量控制器
3-phase unified power quality conditioner(UPQC
三相电能计量标准
the three-phase standard electrical energy
三线态量子产率和寿命
quantum yield and lifetime of triplet state