I need to authorise the customer form for an user as read=True,Write-True,Create=True and Delete=False

I tried this csv pattern

id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink

access_res_partner_admin_staff,"res.partner admin staff",base.model_res_partner,group_admin_staff,1,1,1,0

User permission show's as given by me in access rights but still we can delete the customer.What is the reason..???