短语词组短语Colin Sheaf 主席施福;邦瀚斯亚洲主席施福algebraic sheaf [数]代数层sheaf conveyer [农机]禾捆输送器gap sheaf 沟层sheaf space [数]层空间sheaf collector 集束器ample sheaf 丰富层sheaf conveyor 禾捆输送器quotient sheaf [数]商层 返回 sheaf