等级 – phrases

Terms for subject Ecology containing 等级 | all forms | in specified order only

Chinese	English
土地分等定级	gradation and classification on land
坡度等级	slope grade
恶臭等级从0至6分为六个等级	offensive odor grade
污染等级	classes of pollution
濒危等级标准	endangered level
濒危等级标准	criteria for endangered category
等值声级	equivalent sound level
草地等级	grassland class
颗粒等级	grade of grain