耕地自然质量
Natural quality of farmland
自然质量等
physical quality grade
physical land quality grade
the natural quality grade
Land quality
自然质量等指数
grade index of natural quality
natural quality
磁性物质质量分数
mass fraction of magnetic substances
有机质及养分质量分数
organic matter and soil nutrient content
Olsen婚姻质量自评量表
Olsen marriage quality scale
SQA-V全自动精子质量分析仪
SQA-V Full Automatic Sperm Quality Analyzer
产量自然递减
natural production decline
甘肃省科学院地质自然灾害防治研究所
geological hazards fesearch institute
Gansu Academy of Sciences
geological hazards research institute
高质量自支撑金刚石膜
high quality freestanding diamond films