厚层系的英文

• thick series

• 厚:    thick
• 层:    I storey; tier; stratum
• 系:    system; series
• 层系:    bed series; layer system; measures; series of strata; seriesofstrata; system of beds
• 厚层:    heavy film; heavy layer; high seam; latilaminae; thick bed; thick seam; thick stratum