<tr *ngFor="let item of data; let in=index">
    <td>
                        <input #unitNumber type="text" name="workPerformed-workcode-{{in}}" [(ngModel)] = "item.unitnumber" >
                      </td>
<td> <!-- Search option is given to chose the unit number----></td>
</tr>

@ViewChildren('unitNumber') enteredUnitNumbers;

// for searching, I have used the material dialog box
const dialogRef = this.dialog.open(SearchEquipmentComponent, dialogConfig);

    dialogRef.afterClosed().subscribe(
        data => {
console.log(this.enteredUnitNumbers.toArray().map(x => x))
});