<prompt> The direct filling gold segments can be compacted:By hand pressure aloneBy hand pressure combined with a hand malletBy using electromalletAll of the above  <response>: The gold segments can be compacted by hand pressure alone, by hand pressure combined with a hand mallet, or by a mechanical device that is activated by a spring, pneumatic pressure, or electronically using an electromallet. The direction of force application, the amount of applied pressure, and the compaction pattern are critically important factors controlling the quality of the gold restoration.Ref:Phillips Science of Dental Materials ed 12 pg 414 