Combining A Drill?

[Amnesiaplayer]

Hello.
I want to combine A drill with 3 Drill parts.
i'm sorry but i can't show my Script/inventory file... computer isn't avaible.
But i wanted to make that. The name f drills are like this
DrillA
DrillB
DrillC
i was watching some tutorial videos (Not whole)
Do i need to place the drill and other ONLY in the INVENTORY FILE? (i did it on lang file to)
And someone showed a tutorial about 2 things..
so A,B
and i copied the script and Added C
so it was i think
BucketA
BucketB
or something like that
(Blabla ("BucketA", "BucketB"*****
and i added The third but nor bucket but Drill so like this
(blablablaa ("DrillA", "DrillB, "DrillC"*****
And the drillparts name is only 1 time writen... I
didn't write anything in (tab) ENTITY...
Do i had to do this??
( it doesn't combine in-game )