Let's Go To Coding Mountain - 查理 Charles

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    < table mat - table [ dataSource ] = " dataSourceSeal " matSort >           < ! -- businessType Column -->           < ng - container matColumnDef = " businessType " >             < th mat - header - cell * matHeaderCellDef > 業務別 < / th >             < td               mat - cell               * matCellDef = " let element ; let i = index "               [ attr . rowspan ] = " getRowSpan ( ' businessType ' , i ) "               [ style . display ] = " getRowSpan ( ' businessType ' , i ) ? i : ''"             >               {{ element . businessType }}             < / td > ...