1.Calyx cup-shaped, almost truncate, outside pulverulent pubescent.
花萼杯状,几乎截形,外面粉状短柔毛。
2.Calyx cup-shaped, leathery, pulverulent pubescent, 4-lobed, lobes triangular.
花萼杯状,革质,粉状短柔毛,4浅裂,裂片三角形。
3.Analysis and Research of Existing Metering Installation for Pulverulent Material
粉状物料现有计量装置的分析研究