<nz-select*ngFor="let part of item.combin; let i = index"[(ngModel)]="item.combin[i]"style="float: left; margin-right: 5px;"(ngModelChange)="handlePartChange($event,item,i)">
<nz-select*ngFor="let part of item.combin; let i = index"[(ngModel)]="item.combin[i]"style="float: left; margin-right: 5px;"(ngModelChange)="handlePartChange($event,item,i)">