蒸汽与生物质的质量比
mass ratio of steam and biomass
BGA焊点的质量控制
Quality Control of BGA Solder Joint
B的物质的量浓度
amount-of-substance concen-tration of B
CT片影像质量的控制
Quality control of CT film imaging
DR图像的质量分析
Quality control and analysis of DR images
X刀的质量控制
Quality control of the X- knife
表征的质量
quantity of representation
丙酮氰胺的质量
acetone cyanamide quality